PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1305-A891Cartridge,20 Millimeter

Department of Defense Ammunition Code Assigned and Promulgated by Characteristics and Taxomony Branch Defense Logistics · NSN 1305-00-542-0405 · FSC 1305 · No Item Name Available
Verified by PartsTable
NSN 1305-00-542-0405 — this item is cataloged by the U.S. Government under National Stock Number 1305-00-542-0405. Primary manufacturer part number: 1305-A891.
Features
  • Cartridge,20 Millimeter — FSC 1305
  • Hazardous Material Classification Code: 1.4 DEPARTMENT OF DEFENSE HAZARD CLASS DIVISION AND C STORAGE COMPATIBILITY GROUP AND F DEPARTMENT OF TRANSPORTATION CLASS AND I COAST GUARD CLASS
  • Unable to Decode: UNABLE TO DECODE
  • Unable to Decode: UNABLE TO DECODE
  • Cartridge Model Number: M55A2 LOCATION NOT OTHERWISE SPECIFIED
  • Weapon for Which Designed: GUN, CANNON M39 AND GUN M39A1 AND GUN, CANNON M39A2 AND GUN M61
  • Unable to Decode: UNABLE TO DECODE
  • Tracer Element: NOT INCLUDED
Applications
  • Applications requiring Copper Alloy Cartridge Case construction
General Description

The Cartridge,20 Millimeter, cataloged under National Stock Number 1305-00-542-0405, is classified within Federal Supply Class 1305 (No Item Name Available) of the Ammunition and Explosives group. The primary manufacturer of record is Department of Defense Ammunition Code Assigned and Promulgated by Characteristics and Taxomony Branch Defense Logistics. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1305-00-542-0405
Primary Part Number1305-A891
Item NameCartridge,20 Millimeter
FSC / FSG1305 / 13 — No Item Name Available
ManufacturerDepartment of Defense Ammunition Code Assigned and Promulgated by Characteristics and Taxomony Branch Defense Logistics
StatusACTIVE
Hazardous Material Classification Code1.4 DEPARTMENT OF DEFENSE HAZARD CLASS DIVISION AND C STORAGE COMPATIBILITY GROUP AND F DEPARTMENT OF TRANSPORTATION CLASS AND I COAST GUARD CLASS
Unable to DecodeUNABLE TO DECODE
Unable to DecodeUNABLE TO DECODE
Cartridge Model NumberM55A2 LOCATION NOT OTHERWISE SPECIFIED
Weapon for Which DesignedGUN, CANNON M39 AND GUN M39A1 AND GUN, CANNON M39A2 AND GUN M61
Unable to DecodeUNABLE TO DECODE
Tracer ElementNOT INCLUDED
Dod Ammunition Code1305-A891
Cartridge Grouping TypeSINGLE ROUND
Reference Number Differentiating CharacteristicsDIFFERENTIATED BY PACKAGING
MaterialCOPPER ALLOY CARTRIDGE CASE
Gross Weight102.5 SHIPPING CONTAINER POUNDS AND 3580.0 PALLET POUNDS
Net Explosive Weight0.0214275 SHIPBOARD POUNDS AND 0.0861000 STORAGE POUNDS AND 0.0861000 TRANSPORTATION POUNDS
Detonation Initiation MethodELECTRIC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
1305-00-132-3283 INTERCHANGEABLE
Cartridge,20 Millimeter
1305-00-752-8114 INTERCHANGEABLE
Cartridge,20 Millimeter
1305-01-116-45609344281 INTERCHANGEABLE
Cartridge,20 Millimeter
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate
1305-01-119-8548 INTERCHANGEABLE
Cartridge,20 Millimeter
Cross-Reference Index
Part NumberManufacturer
1305-A891 Department of Defense Ammunition Code Assigned and Promulgated by Characteristics and Taxomony Branch Defense Logistics (USA)
7258817 Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA)
Related Parts
1305-00-132-3283INTERCHANGEABLE
CARTRIDGE,20 MILLIMETER
1305-00-752-8114INTERCHANGEABLE
CARTRIDGE,20 MILLIMETER
1305-01-116-4560INTERCHANGEABLE
CARTRIDGE,20 MILLIMETER
9344281
1305-01-119-8548INTERCHANGEABLE
CARTRIDGE,20 MILLIMETER

Frequently Asked Questions

What is NSN 1305-00-542-0405?

NSN 1305-00-542-0405 is a Cartridge,20 Millimeter, manufactured by Department of Defense Ammunition Code Assigned and Promulgated by Characteristics and Taxomony Branch Defense Logistics, classified under FSC 1305 (No Item Name Available). Status: active.

What are the part numbers for NSN 1305-00-542-0405?

NSN 1305-00-542-0405 has 2 cross-referenced part numbers: 1305-A891 (Department of Defense Ammunition Code Assigned and Promulgated by Characteristics and Taxomony Branch Defense Logistics), 7258817 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).

What NSN replaces 1305-00-542-0405?

There are 4 known substitutes for 1305-00-542-0405: 1305-00-132-3283, 1305-00-752-8114, 1305-01-116-4560 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1305-A891?

Key specifications for 1305-A891: Hazardous Material Classification Code: 1.4 DEPARTMENT OF DEFENSE HAZARD CLASS DIVISION AND C STORAGE COMPATIBILITY GROUP AND F DEPARTMENT OF TRANSPORTATION CLASS AND I COAST GUARD CLASS; Unable to Decode: UNABLE TO DECODE; Unable to Decode: UNABLE TO DECODE; Cartridge Model Number: M55A2 LOCATION NOT OTHERWISE SPECIFIED. 14 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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