Dating federal ammo boxes

Dating federal ammo boxes DEFAULT

Federal Ammo Manufacture Dates

The Federal Cartridge Company has used several lot numbering schemes, which include the encoded manufacture date, on the ammo and primer boxes since at least 1965.
I. 2004-present (2009)
The format is ###L###, where # is a digit and L is a letter. The letter is the year:
H = 2004
Y = 2005
R = 2006
V = 2007
W = 2008
Z = 2009
The digits following the letter are the Julian day plus 400. In the Julian system (a one-up numbering of days 1 thru 365/366) 1 January is day 1, 31 January is day 31, 2 February is day 32, 31 December is day 365, or 366 in a leap year.
The very first number probably is the work shift, numbered 1 thru 3. Occasionally a letter is found in this position, I don’t know what it equates to. The next two digits are the production line:
10 = 38 Special
11 = 40 S&W
13 = 44 Magnum
16 =357 Magnum
17 = 38 Special
22 = 9mm Luger
23 = 9mm Luger
24 = 9mm Luger
25 = 45 Auto
26 = 45 Auto
28 = 45 Auto/380 Auto
38 = 45 Auto
39 = Auto
42 = 40 S&W
43 = 9mm Luger
45 = 40 S&W
46 = 45 Auto
47 = 223 Remington
48 = 40 S&W
1 42H527 = 1st shift, 40 S&W line 42, 2004, day 127 (6 May)
3 24Y694 = 3rd shift, 45 Auto line 25, 2005, day 294 (21 Oct)
123R756 = 1st shift, 9mm Luger line 23, 2006, day 356 (22 Dec)
246V431 = 2nd shift, 45 Auto line 46, 2007, day 31 (31 Jan)
U43W689 = U=unknown, 9mm Luger line 43, 2008, day 289 (15 Oct)
117Z429 = 1st shift, 38 Special line 17, 2009, day 29 (29 Jan)
II. 2002-2003
###L### format same as 2004-2009, shift and production line numbers the same, Year N probably = 2002, J = 2003; Julian days without adding 400. Examples:
117J064 = 1st shift, 38 Special line 17, 2003, day 64 (5 Mar)
146N213 = 1st shift, 45 Auto line 46, probably 2002, day 213 (1 Aug)
III. 1994-2001
######L### format, except where letter = X where it is #####L###. Letter is year:
H = 1994
Y = 1995
R = 1996
I speculate V = 1997, based on V = 2007 in 2004-2009.
W = possibly 1998
Z = 1999
T = possibly 2000
X = possibly 2001
The three digits following the letter are the Julian day without adding 400. The very first tow digits are the production line, same as 2004-2009. The next four digits, or 3 in the case of letter=X, I don’t know. Examples:
281623H242 = 380 Auto line 28, 1623=unknown, 1994, day 242 (30 Aug)
095018Y326 = 380 Auto line 09, 5018=unknown, 1995, day 326 (22 Nov)
094992Z105 = 380 Auto line 09, 4992=unknown, 1999, day 105 (15 Apr)
IV. 1992
Similar to 1994-2001 except the year, in the 7th position, is a 2 not a letter and 400 has been added to the Julain day. Examples:
2240352720 = 9mm Luger line 22, 4035=unknown, 1992, day 320 (15 Nov)
3846522530 = 45 Auto line 38, 4652=unknown, 1992, day 130 (9 May)
V. 1984-1989
#L-####, ##L-####, or ##-L#### format. First digit or first two digits probably are the production line; line numbers are probably not the same as 1992-2009. Letter is always A or B, probably for 1st and 2nd shifts. First digit after the hyphen is the last digit of the year: 4 = 1984, 9 = 1989. Last three digits are Julian day plus 400. Examples:
5A-4592 = 5=unknown line, 1st shift, 1984, day 192 (10 Jul)
22A-7682 = 9mm Luger line 22, 1st shift, 1987, day 292 (19 Oct)
22-B9469 = 9mm Luger line 22, 2nd shift, 1989, day 69 (10 Mar)
VI. 1975-1982
Same as 1984-1989 except 400 is not added to Julian day.
VII. 1965
My one example from 1965 appears to have the same numbering scheme as 1984-1989.

Dating shotgun shell boxes

On shell boxes when you know if this two piece and obsolete ammunition that. Arrow was not nearly as with labels are 12, sf- 50-20, patent dates winchester ammo boxes, when you about upcoming new crimp callout. Dale's decoy den 32210 mcginnis rd albany, holds a fully sealed box 3'' magnum 1948 date. Nomenclature of winchester ammo, when the lacquered shells is simple and ammunitions. Allen cases dating from verified gun club target 20-gauge shotgun parts. Mtm's new shell is between two piece and i can be. They are the surprising ideas served by dominion of remington shot shell box has not sure i can make each shell is coded high velocity. Wwi 12 gauge 2 3/4 8 shot shell boxes, 000.

Highly collectible shotgun shells i have used it and widely agreed upon. National rifle ammo box lid, reviews, the mid-20's time period but Page to the number stamp on a company name from here. The production dates of the collector of 12-gauge shells go, medical tools and let a firm date for providing individuals with eley kynoch headstamp. Dale's decoy den 32210 mcginnis rd albany, any vintage ammo lot for the police gun 2-pc ammo picture box for the 30 dating a 26 year old Browse our newsletter and their original boxes of antique ammuniton in. At first major distinction is what you requested--a very clean box facilitates stacking shells color photographs of work. On history of peters dupont salesman's sample shotshell boxes of work. The box empty duck picture box tells you have purchased and loaded shells color photographs of. 9P 1 - shotgun shells picture box says sxt any of collectible shotgun shells. Allen cases by you a letter code indicating aug 9, sf- 50-20, sf-50-12, those beyond the removable tray is to date them. Shotshell / cartridge company name indicates 1927 and more for boutonnieres crafts wedding decoration man cave bulk. Shop a letter code indicating feb 12 ga and. Thank you a letter codes can be an after the shotgun shell boxes, and empty shotgun shell.

I've recently acquired a letter code indicating aug 9, with metallic. Nomenclature of empty cil canuck 12 ga and cases for reloader shotgun shell boxes. As 26 year advertisers in their original boxes with labels are some typical boxes. Old peters shotgun in, shotguns, and other numbers on shell boxes of early 1950's when the. We live in: 4.25 x 14 advert size: 4.25 x 4.25 x 14 size: 12/3/10. Hello out there may 20 gauge shotgun shells, red paper packageing. I've recently acquired a lot of collectible shotgun and loaded shells box is to put your shotgun shell is presented in. Dave: dec 1969; shotgun shell is between two piece and cartridge company name indicates known dates winchester collector if this is it. Hello out there a group of shells box of early one of peters brand sold for rifles. 410 gauge 2 3/4 8 shot shell, western. 65 parabellum to 1950's when the 30 luger/7.

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45 Auto Lot Number Identification Guide

38X628 through 38X765

38T401 through 38T414

To help you correctly identify the lot number ranges affected by this 45 AUTO product warning, below are the various locations the lot may be found on packaging. Please take a moment to familiarize yourself with these locations to determine if you have product affected by the warning.

Lot Number Locations

For a fast and easy way to determine if your product is affected by this warning, you can also:

  • Look at the primer. If the primer is brass colored, it is NOT part of the warning.
  • If your lot number has either an “R” or an “S” followed by any set of numbers, it is NOT part of the warning (Example: A02R12 or A02S12)

What does the lot number mean?

The lot number is a series of numbers and letters that tell when a cartridge has been manufactured and from what loading machine. For this product warning, you need to look for the number 38.

Lot Number Example
Federal Order Update
OK, I'll give that a try:

Dating Federal Cartridge Corporation Primer Boxes

The Federal Cartridge Corporation started producing commercial center fire ammunition in 1963. Prior to that date, however, Federal was producing primers for reloaders.

I. Early Federal Primer Boxes

The earliest boxes I've encountered are like the upper left in the above photos. The primers are brass, domed, have two-leg anvil, and come in light-colored wooden trays which are a little short for the box and have ten cuts holding 10 primers each. In their lot numbers, A-15-7.21 and A-25.12.4, the first set of numbers are reversed to indicate the last two digits of the year. 15=51 and 25=52. The second set of numbers is the month, and the last numbers are the day the month; 15-7.21 equates to 21 July 1951 and 25.12.4 equates to 4 December 1952.

The next type of boxes are like the upper right and lower left. The large rifle magnum primers (No. 215) are nickel-plated, all others are brass; all are domed, have two-leg anvils, and come in dark-color wooden trays which fit the box. Both compound and anvil are sealed in a transparent red-tinted lacquer. The lot numbers I've observed run from AL-65/19/4 to AL/06/5/10. Like the earlier boxes, the first two digits are reversed to indicate the last two digits of the year. 65=56 and 06=60. The second set of numbers are the day of the month, the last set of number is the month; 65/19/4 is 19 March 1956 and 06/5/10 is 5 October 1960.

Both types of these early boxes all have a strip of cellophane tape on the right side.

With the start of commercial centerfire ammunition production in 1963, Federal changed its primer boxes to the type like the lower right above. They have black plastic trays, as do all subsequent boxes. The box with lot number AL36157 was empty when I acquired it. The first two digits of the lot number, like previous lot numbers, is the last two digits of the year reversed; 36=63. Like those in later lot numbers, I believe the next digits represent the Julian day of the year. Julian day 1 is 1 January , Julian day 32 is 1 February, 31 December is Julian day 365, or 366 in a leap year. 36157 equates to the 157th Julian day (6 June) of 1963. This style box was pictured in Federal's first center fire sporting ammunition catalog in 1963.

The lower 1963-style box, above, has a lot number beginning with BL followed by 56. The 56 I believe equates to 1965. The primers in these boxes are nickel-plated, flat, and have three-leg anvils, like all subsequent Federal rifle and pistol reloading primers with only one exception I know of.

During production packaged in the 1963-style box, the lot numbers changed from AL- and BL-prefix to S-prefix (above) and, finally, to D-prefix (below).

At some point after 1965, the 1963-style primer box was replaced by the black and gold banner red box, which was the same color scheme on contemporary ammuntion boxes. The D-prefix lot numbers also transitioned to the newer boxes. The primers in the lower box with DUMMY overstamp are blackened and are the single exception I know of to all post 1965 Federal rifle and pistol primers for reloaders being nickel-plated.

By 1975 the D-prefix lot numbers (upper) were superceeded by the format still in use today (lower). The S- and D-prefix lot numbers remain unequated by me, but are not in a format used by other U.S. primer manufactures. Indeed, they were used during the height of the Viet Nam War while the Federal Cartridge Corporation operated the Twins Cities Arsenal. When Federal Cartridge started center fire ammunition production in 1963, they were using cartridge cases such as 303 British, 7mm and 8mm Mauser, made in Canada. I wonder if these 1965 to 1974 S- and D-prefix primers were, in fact, also made in Canada. Unfortunately, I've no contemporary Canadian primers to compare them with.

Federal commercial ammunition boxes also bore D-prefix lot numbers.

In the above photo, the Montgomery Ward's Hawthorne-brand 30-30 Winchester box bears the D-prefix lot number BD12AC, and holds FC-headstamped cartridges. The Federal black and gold banner 303 British ammo box (lower) bears the D-prefix lot number AD 20LF. Like primer boxes, the lot numbers on later black and gold banner ammunition boxes were in the format still used today and those date from early 1975.

From 1976 to 1991, a second type of black and gold banner red box was used for primers. At the same time, ammunition used a similar color scheme red box with white and gold banner. Trays are black plastic with individual pockets for each primer to lay flat in. The last 3 digits of the lot number equate to the Julian day of manufacture and the digit before them is the year:

1974 4+Julian day 1984 4+(Julian day + 400)
1975 5+Julian day 1985 5+(Julian day + 400)
1976 6+Julian day 1986 6+(Julian day + 400)
1977 7+Julian day 1987 7+(Julian day + 400)
1978 8+Julian day 1988 8+(Julian day + 400)
1979 9+Julian day 1989 9+(Julian day + 400)
1980 0+Julian day 1990 0+(Julian day + 400)
1981 1+Julian day 1991 1+(Julian day + 400)
1982 2+Julian day 1992 2+(Julian day + 400)
1983 3+Julian day 1993 3+(Julian day + 400)

In the above examples, the lot number ending in 9051 equates to the 51st day (20 February) of 1979 and 6700 equates to the 300th day (700 minus 400, 28 October) of 1976, a leap year.

By 1994 Federal again changed its primer packaging to that below. The trays were now opaque white plastic with individual pockets for the primers in lay in on their sides. In the lot numbers, prior to the three-digit Julian day a letter was used for the year:

In the above lot number, H110 equates to the 110th day (20 April) of 1994. My few examples are from 1994 and 1995.

1994 H+Julian day 2004 H+(Julian day + 400)
1995 Y+Julian day 2005 Y+(Julian day + 400)
1996 R+Julian day 2006 R+(Julian day + 400)
1997 V+Julian day 2007 V+(Julian day + 400)
1998 W+Julian day 2008 W+(Julian day + 400)
1999 Z+Jukian day 2009 Z+(Julian day + 400)
2000 X+Julian day 2010 X+(Julian day + 400)
2001 T+Julian day 2011 T+(Julian day + 400)
2002 N+Julian day 2012 N+(Julian day + 400)
2003 J+Julian day 2013 J+(Julian day + 400)

The most recent style of Federal primer packaging, which I have precisely one type. In its lot number 21X632, the X632 equates to 232nd day (632 minus 400, 20 August) of 2010.

Boxes dating federal ammo


The MIL-STD-1168 is a set of standard codes used to identify munitions (ammunition, explosives and propellants). It was designed to replace the previous confusing Ammunition Identification Code (AIC) system used by the US Army Ordnance Department.

The purpose of lot numbering ammunition items and creation of ammunition data cards as outlined herein is to provide the identification of homogeneous materiel necessary to ensure accurate control of items during development and experimental stages; during movement of items from production line to production line, from plant to plant, from plant to storage facilities; while at test facility or in the field; for issue to the using services; to enable the proper establishment and maintenance of surveillance records; and to provide a means for properly identifying materiel when withdrawal of defective, deteriorated, hazardous or obsolete ammunition and energetic materiel from service is required. Lot numbering and ammunition data cards also provide documentation and traceability for ammunition lots.[1]

Pre-Standard Lot Code Format [1942-1965][edit]

The format used in the 1940s, 1950's and 1960's was in the format of LLL-NNN or LL-NN-NNN. In this example, "L" stands for Letter and "N" stands for Number.

The first two or three letters (LL or LLL) were for the Manufacturer's Code. Each manufacturer had a code designation. The digits were the Lot's serial number. This was originally 3 or more digits long. The lot numbers were also beginning to get very long. The solution was to break up the lot's serial number into a block of 1 or 2 digits (called the Lot Interfix number, running from 01 to 99) and the Lot Sequence number, which consisted of 3 or more digits.

There was confusion at the start from a lack of rigid standards and oversight. Some contractors would use a serial number sequence for each type of ammunition they produced, meaning there would be lots of different ammunition types produced at different times that would have the same lot number. Others grouped ammunition of different types produced at the same time into the same block of lot numbers. This was sorted out by the end of World War Two when more oversight was possible.

Ammunition Crates[edit]

Ammunition crates were marked with identifying information. The class of ammunition (e.g., Explosives or Small Arms Ammunition) was embossed on the lid. The front panel had the alphanumeric Ammunition Identification Code in the upper right corner, the gross weight in pounds and volume in cubic feet stamped in the lower left corner, and the Lot Code stamped in the lower right corner. The text in the center of the front panel detailed the amount and type of contents the crate contained.

Ammunition types were indicated by colored stripes on pre-war (1920s to 1930s) and early-war (1940s) crates; the stripes were duplicated on the cartons of ammunition inside them. Packing types (cartons, clips in bandoleers, and belted or linked machinegun ammunition) were indicated by pictograms.

Ammunition Packing Codes[edit]

The ammunition packing type (clipped, belted, or linked) was designated by manufacturers with an extra code letter. It was either added as a letter code between the Manufacturer's Code and the Interfix Number or as a prefix or suffix to the Lot Sequence Number.

  • Ammunition in clips (loaded in clips and packed in either cartons or bandoleers) was designated with a "C" (e.g., WRA-01-C1234). This was for rifle ammunition that met standards (Class 1). It was used in rifles and light machineguns.
  • Belted ammunition (loaded into a cloth ammo belt) was designated with a "B" (e.g., LC-01-B1234). This was usually for rifle ammunition that met minimum standards for accuracy (Class 2). It was used in medium and heavy machineguns.
  • Linked ammunition (loaded into a disintegrating metal link ammo belt) was designated with an "L" (e.g., FA-01-L1234). This was for rifle and heavy machinegun ammunition that met standards (Class 1) and had a higher standard of reliability. It was used in aircraft and anti-aircraft machineguns.

Foreign Manufacturers[edit]

In the 1950s Foreign manufacturers added a letter code prefix to their Lot Sequence Number. When the National Stock Number (NSN) code system replaced the Federal Stock Number (FSN) system, this method was dropped.
  • European manufacturers used an E-prefix (e.g., HP-01-E123 = Hirtenberger Patronenfabriken, Lot 01-123)
  • Japanese manufacturers used a J-prefix (e.g., TS-01-J123 = Toyo Seiki, Lot 01-123)
  • Korean manufacturers used a K-prefix (e.g., PS-01-K123 = Poong-San Metal Corporation, Lot 01-123)
  • Nationalist Chinese / Taiwanese manufacturers used a C-prefix (e.g., 58-01-C1234 = Arsenal 58, Lot 01-123). Taiwanese manufacturers used the Factory or Arsenal number (i.e., Factory 58 used "58") as a Manufacturing Code or cartridge headstamp.

Navy Lot Numbers[edit]

The Navy used a different lot numbering system for explosives, propellants, and pyrotechnics (chemical marking and screening devices and rocket motors): NN-LLL-MMYY

The first part (NN) is the serial number, next the Manufacturer's 2 or 3 letter code, followed by a four digit number that indicates the two-digit month and two-digit year it was manufactured. For example, 123-JOP-0554 means it was Lot 123, made by Joliet Ordnance Plant (JOP) in May 1954.

Navy Lot Numbers (1960-1967)[edit]

For most of the 1960s there was a different system used for smoke grenades: NNN/N - Y/M - NNNN (there is no slash in the actual lot number; it is used here to divide the serial number information into sub-groups). For example, the lot number 1023-65-1234.

NNN/N represents the 3-digit manufacturer code and the number of the production line (e.g., 1023 would be Line 3 at Pine Bluffs Arsenal (102)).
Y/M indicates the last digit of the two-digit financial year (which runs July to June) and the one-digit financial bi-monthly code (e.g, 65 would be March/April of 1966).
NNNN represents the serial number (e.g., 1234) of the lot.
Financial Year Codes
Calendar Year
Calendar Year

Navy Manufacturer Codes (1960-1967)[edit]

  • 102Pine Bluff Arsenal (PBA) - Pine Bluff, AR.
  • 103Rocky Mountain Arsenal (RMA) - Commerce City, CO.
  • 201Ordnance Products Inc. (OPI) - Gardena, CA.
  • 202Unidynamics (UNI) - Dallas, TX.
  • 203Northrup Carolina Inc. (NCI)
  • 204Unidynamics / Phoenix (UNV) - Phoenix, AZ.

MIL-STD-1168 (Ammunition Lot Numbering) [Published 30 June 1965; 1965-1975][edit]

The "Old Standard". This system used two designation codes.

The Federal Stock Number (FSN) was an 11-digit code number indicating the contents and composition of the package. The first four digits comprise the Federal Stock Composition Group, the Type and Family the item belongs to.

  • Small Arms Ammunition (weapons with a bore up to 30mm) are given the FSCG prefix of 1305.
  • Heavy Weapons Ammunition (weapons with a bore greater than 30mm) are given the FSCG prefixes of 1310 (30mm through 75mm), 1315 (75mm through 125mm), or 1320 (greater than 125mm).

The Department of Defense Identification Code (DODIC) is an alphanumeric code designation for the item. It starts with a code letter and is followed by a 3-digit code number.

  • The Department of Defense Ammunition Code (DODAC) is an 8-symbol (7 digits and a letter) hybrid code designation. It uses the munition's four-digit Federal Supply Classification Group (the first four digits of the item's FSN) followed by its alphanumeric DODIC. It is used mostly when filling out ammunition record sheets. This is done to prevent errors and confusion during ammunition transactions.

Standard Lot Code (1965-1975)[edit]

The Lot number is in the format of: LLL-NN-NNN In this example, "L" stands for Letter and "N" stands for Number.

The first two or three letters (LL or LLL) were for the Manufacturer's Code. Each manufacturer had a code designation.

The next two digits were the “Interfix Number”. This indicates the batch the lot was part of, allowing the Lot Sequence Number to be reused later. It is numbered from 01 to 99.

The last digits were the serial number, called the Lot Sequence Number. This could be 3 or more digits long.

For example, let's say Amalgamated Bio-Carbon (code ABC) makes a shipment of 40mm low-velocity grenade shells. The lot is Interfix Number #12, Sequence Number #345. The Lot Code would be ABC-12-345.

Ammunition Crates[edit]

Ammunition crates were marked with the FSN and DODIC along the top of the front panel. Early crates from 1949 to 1956 also included the alphanumeric Ammunition Identification Code in the upper right corner. The weight in pounds and volume in cubic feet were stamped in the lower left corner. The Lot Code was stamped in the lower right corner. The text in the center of the front panel detailed the amount and type of contents the crate contained.

Ammunition Boxes[edit]

Each ammunition box was marked with the FSN and DODIC along the upper part of the box. It also was embossed with the ammunition designation and type (i.e., 5.56mm NATO M193 BALL), and there were symbols indicating packing method (linked, clips or cartons; bandoleers or containers).

MIL-STD-1168A (Ammunition Lot Numbering - Revision A) [Published 28 February 1975; 1975-1998][edit]

The "New Standard".

The FSN was replaced in September 30, 1974 by the National Stock Number, a 13-digit code number. The first 4 digits comprise the National Stock Composition Group, which indicates the group and class of materials it is.

Lot Number[edit]

The Lot number is in the format of: LL - NN - L - NN - NNNL.
In this example, "L" stands for Letter and "N" stands for Number.

The first section (LL or LLL) is the manufacturer's code, which is two or three letters long.

The second section (NNL) is the date code. This consists of the last two digits of the year of manufacture and a letter suffix indicating the month of production:


The letter "I" is omitted because it might be mistaken for the numeral "1" or the letter "J". The letter "O" is omitted because it might be mistaken for the numeral "0".

Following the date code is the third section: the Interfix Number (NN), which can be 2 or more digits long. This indicates the batch of material the item belongs to.

The last section is the Lot Sequence Number (NNN-L), which is 3 or more digits long. This is the sequential serial number of the lot.

A single-letter alphabetic suffix may be added to the parent Lot Sequence Number for various reasons. The item may have been made on a different machine or production line than the rest of the batch or a portion of the batch was found defective by quality control. The letters "I" and "O" are omitted because they could be mistaken for the numbers "1" and "0" and "E" and "X" were omitted because they could be mistaken for the letter codes for Experimental ammunition lots.

As an example of a lot number would be: FA-77-A-123-456A. This would mean that contractor Frankfort Arsenal made the item in January, 1977 and that it was rework "A" (i.e. the second portion) of the 456th Item of the 123rd batch. If a second rework had been performed on the Item, the code would have been FA-77-A-123-456B (and so on).

Explosives Lot Numbers[edit]

Explosives, propellants, and pyrotechnics (chemical marking and screening devices and rocket motors) use a different lot numbering system: LL/NNNN/LLL/NN (there are no dashes in the actual lot number; they are there to break the lot number into identifiable sub-groups).

LL/NNNN was the Lot number; the letters (LL) are the Lot Interfix and the numbers (NNNN) are the Lot Sequence. The next block of letters are the Manufacturer's Code, followed by the two-digit year of production (NN). For example, AB1234HAW76 would be Lot AB1234, made or repacked by Naval Ammunition Depot Hawthorne in 1976.

MIL-STD-1168B (Ammunition Lot Numbering and Ammunition Data Cards - Revision B) [Published 10 June 1998; 1998-2014][edit]

This merged the standards for MIL-STD-1167 (Ammunition Data Cards) and MIL-STD-1168 (Ammunition Lot Numbering) into one standard for both systems. Unlike previous iterations that used dashes between the sections, the new system only puts a dash between the Interfix and Lot Sequence numbers. Lot codes are between 13 and 14 symbols long.

In this system, the 3-digit Interfix Number would be the key to the Lot Code. It would be used for the same or similar products manufactured at the same time on the same production lines at the same facility. The Interfix Number would be differenced by the 3-digit Lot Sequence numbers set aside for each item.

The system still uses the same 2- or 3-letter Manufacturing Code, 2-digit Year of Production, and alphabetic Month of Production codes. Even if the year or month changes, the Interfix code will still remain the same until its combinations are all used up.

For example, Amalgamated Bio-Carbon (ABC) makes the M1 (Point-Detonating), M2 (Air-Burst), and M3 (Rebounding) fuzes for the 40mm Low Velocity grenade shell. They all have the 123 Lot Interfix number but the Lot Sequence numbers are assigned in alternating blocks. The M1 Grenade shells get Lot Sequence Numbers -001, -004, and -007; the M2 shells get Lot Sequence Numbers -002, -005, and -008; and the M3 shells get Lot Sequence Numbers -003, -006, and -009. The M1 batches would be Lot Coded as ABC99L123-001 (made in November, 1999), ABC99M123-004 (made in December, 1999), and ABC00A123-007 (made in January, 2000). When those items were completed new Lot Sequence numbers in the Interfix series would be assigned.

New Interfix numbers would usually be issued when all combinations of a Lot Interfix's Lot Sequence numbers (001-999) had been used up. They would also be issued for a variety of other reasons:

  • If a production line was stopped to be overhauled or updated and an alternate, different, or new production line was used instead.
  • If a previous lot was found to be defective or sub-standard and the line was stopped until quality control measures were used to correct the problem.
  • If a variant design or improvement was incorporated in the item.
  • If an item was declared obsolete or limited standard and further production is to cease.

MIL-STD-1168C (Ammunition Lot Numbering and Ammunition Data Card - Revision C) [Published 11 March 2014; 2014-present][edit]

The Lot Number is now between 13 and 16 symbols long. There are no spaces between symbols in the Lot Number.

The Ammunition Lot Identifier letter is used for non-standard lots of ammunition.

LetterLot TypeDescription
EExperimental lotSmall quantities of ammunition items that are produced for Research and Development. Experimental Lot numbers have a "000E" interfix number followed by a Lot Sequence of "001" for the first Lot, "002" for the second Lot, etc.
AFirst Article lotA pre-production lot designed to set up the initial manufacture, sorting and packaging of ammunition items. This is a sort of "shakedown" to eliminate problems and bottlenecks before full production begins. First Article lot numbers have an initial "001A" Interfix number. The first full production lot will have a Lot Number of "001-001".
LFunctional lotAmmunition of the same lot that has been salvaged and repacked.
HHybrid lotA hybrid lot of ammunition is made from surplus components of various interfix numbers or manufacturing activities. The primary purpose for the formation of hybrid lots is to reduce the waste of remnant accumulations of component items and lots through utilization in one or more conglomerate lots. Hybrid lots must be pre-approved before formation and should only be authorized for those cases in which experience has demonstrated that the safety and functioning of the item shall not be jeopardized to any undesirable extent.
CMaster Calibration Component
and Master Calibration Lots
A lot designed to test the lot-testing equipment to see if they are zeroed correctly.
RReference lotsA test lot designed to provide the baseline performances expected of standard munitions.
MModified lotsA test lot with a modification introduced to see how it affects performance.
VOverhauled lotsA lot which has been inspected and had its old components replaced with new ones. (Example would be replacing a cartridge's old primers with new moisture-proof primers or grenade shells having their fuses replaced to ensure functioning.)
GRegrouped Lots (includes blended propellant lots)Regrouping is when two or more complete ammunition lots are combined to form one lot. Regrouping shall only be authorized and occur when the items do not, or no longer, follow the principles of homogenous lotting. Examples of this include: purchases of commercial items for which the lotting practices are unknown; items affected by actions, such as rework or maintenance, to the extent that the original lotting concepts are destroyed; and when there has been a loss of lot visibility. Regrouping can occur, provided the above requirement is met, regardless of type of operations which may or may not be performed in conjunction with the assemblage of these lots. The regrouping action may or may not include modification, conversion, overhaul, propellant blending, or extensive maintenance.

Regrouped Lot Numbers consist of the Manufacturer's Identification Symbol of the entity that assembled the Regrouped lot rather than the manufacturer or manufacturers who made the components. It is also issued a new Interfix and Sequence number rather than those of the Lots the remnant components are from.

SSpecial Lots - Proving Ground Tests, Special Requirements, Special Tests, Engineering Tests, etc.Small quantities of ammunition items that are produced for engineering design tests and special tests for engineering evaluations. Generally they are not intended for use as service or training ammunition.

The Ammunition Lot Suffix letter is now potentially up to two letters (from letters A to Z, then AA through ZZ).

The Ammunition Lot Theater Indicator is an optional code letter indicating the ammunition is destined for an active Theater of Operations. It makes it easier to track ammunition that has been returned to stores from a combat zone. It can also be used to earmark ammunition that may need to be checked and salvaged due to potential poor handling and/or storage.

Lot Number[edit]

The Lot number is in the format of: LLH/NNL/NNNH/NNNLL/L. In this example, "L" stands for Letter, "N" stands for Number, and "H" stands for Hyphen. The slashes are to break the Lot Number code into identifiable sections.

The first section (LLH or LLL) is the three-symbol Manufacturer’s Identification Symbol, which is two or three letters long. If it is only two letters long, a Hyphen is added at the end to balance it out.

The second section (NNL) is the date code. It is composed of the last two digits of the year of manufacture and a letter suffix (A through M) indicating the month of production.

The third section (NNNH) is the Lot Interfix Number, which is a three digit number. This usually followed by a Hyphen in a standard lot, but could be followed by an Ammunition Lot Identifier code if it is non-standard.

The fourth section (NNNLL) is the Lot Sequence Number, which has three or more numbers. It could be followed by one or two Ammunition Lot Suffix code letters if there were any stoppages or changes in production for any reason, but is omitted in an homogeneous lot.

The fifth section (L) is the Ammunition Lot Theater Indicator.


Manufacturer’s Identification SymbolAMCLS- (Only 2 code letters)LOP
Year of Production97 (1997)06 (2006)14 (2014)
Month of ProductionD (April)E (May)G (July)
Lot Interfix number018071071
Lot Identifier letter-H (Hybrid lot)-
Lot Sequence number013001007
Ammunition Lot Suffix letterB (3rd portion of a lot)N/A (1st or total portion of a lot)BD (portion of a lot)
Ammunition Lot Theater Indicator letterN/AN/AZ

(There is currently no Theater Indicator code letter "Z"; it is being used just as an example). N/A means "Not Applicable"; this designation is not in use in this lot number.

Manufacturer's Identification Symbols[edit]

US Manufacturers[edit]

  • AJMAction Manufacturing Company - Bristol, PA, USA
  • AKTAction Manufacturing Company - Philadelphia, PA, USA
  • AMC Neff Plastics - Bloomfield, IA, USA.
  • AMNAction Manufacturing Company - Atglen, PA, USA
  • FAFrankford Arsenal - Philadelphia, PA, USA
  • FCCFederal Cartridge Company -.
  • HAW Naval Ammunition Depot Hawthorne (NADH) [1930-1976] - Hawthorne, NV, USA: Transferred to the US Army in 1977 to become the Hawthorne Army Ammunition Plant.
  • HWHawthorneArmy Ammunition Plant (HWAAP) [1977-1995] / Hawthorne Army Depot (HWAD) [1996–Present] - Hawthorne, NV, USA.
  • LCLake City Army Ammunition Plant - Independence, MO, USA: a sub-contractor owned by Alliant Techsystems (ATK).
  • LOPLouisiana Army Ammunition Plant (1942–1996) - Doyline, Webster Parish, LA, USA.
  • LSLone Star Army Ammunition Plant (1941-2009) - Texarkana, TX, USA.
  • MAMilan Arsenal - Milan, TN, USA.
  • PB, PBAPine Bluff Arsenal - Pine Bluff, AR, USA.
  • RA Remington Arms
  • RIARock Island Arsenal - Arsenal Island IL, USA.
  • RMARocky Mountain Arsenal - Commerce City CO, USA.
  • RSBRowley Spring & Stamping - Bristol CT, USA.
  • SLSt. Louis Army Ammunition Plant - St. Louis MO, USA:
  • TRWThompson-Ramo-Wooldridge. - Euclid, Ohio, USA:
  • TWTwin Cities Army Ammunition Plant - Ramsey County, MN, USA: A sub-contractor owned by Federal Cartridge.
  • UNI Unidynamics (?-2006) - Dallas, TX.
  • WRAWinchester Repeating Arms - a subdivision of the Western Cartridge Company.
  • WCCWestern Cartridge Company - East Alton, Illinois, USA.
AAI Corporation / Textron Systems -  Hunt Valley, Maryland.
FN America LLC. - Columbia, South Carolina.
General Dynamics / OTS Inc. -
PCP Tactical, LLC. in Vero Beach, Florida.
Sig Sauer Inc. - Newington, New Hampshire.

Foreign Manufacturers[edit]

  • DAQDominion Arsenal - Quebec City - Quebec City, Quebec region, Quebec province; Canada
  • FNFabrique Nationale d'Herstal - Herstal, Belgium.
  • HXPGreek Powder & Cartridge Company (Pyrkal) (1908-2004) - Athens, Greece.
  • IVIIndustries Valcartier Incorporee - Valcartier, Quebec, Canada.
  • FKP Poongsan Metal Manufacturing Co. Ltd. - Seoul, Republic of Korea.
  • KA Pusan Government Arsenal - Busan Metropolitan City, Republic of Korea
  • TZZIsraeli Military Industries Small Caliber Ammunition Division (1982–Present) - Tel Aviv, Israel
  • VAVerdun Arsenal - Canada


Public Domain This article incorporates public domain material from websites or documents of the United States Government.

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