NSN 1305-00-542-0406, 1305005420406
CARTRIDGE,20 MILLIMETER

Federal Supply Classification: FSC 1305 - Ammunition, through 30mm
National Item Identification Number: NIIN 005420406
Codification Country: United States
Item Name Code: INC 19879
Criticality: (X) This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Hazardous Material Indicator Code: (N) There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials.

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DLMS^® Summary

National Stock Number 1305-00-542-0406

National Stock Number (NSN) 1305-00-542-0406, or NIIN 005420406, (cartridge,20 millimeter) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There are no manufacturer part numbers associated to this NSN.

This part number has not been procured by the US Government in over 5 years.

This NSN is assigned to Item Name Code (INC) 19879. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 1305005420406 does not contain precious metals.

This NSN is associated to Schedule B 9306304130: cartridges containing a projectile, nesoi. The Schedule B End Use is listed as tanks, artillery, missiles, rockets, guns and ammunition. NAICS classification category 332992: small arms ammunition manufacturing.

This information was last updated on Aug 01, 2025.

Technical Characteristics

III SHIPPING CONTAINER QUANTITY PER PALLET: (SCQP) 24
PACKAGE NOMINAL OVERALL HEIGHT (NON-CORE): (PKNH) ERR-070
UNABLE TO DECODE: (PKNL) UNABLE TO DECODE
PACKAGE REFERENCE NUMBER (NON-CORE): (PKRN) X7553210
SHIPPING CONTAINER QUANTITY PER PALLET: (SCQP) 24
UN ORGANIZATION SERIAL NUMBER: (SERN) 0321
UNIT PACKAGE QUANTITY (NON-CORE): (AGUC) ERR-070
UNABLE TO DECODE: (LBLC) UNABLE TO DECODE
UNABLE TO DECODE: (PKNH) UNABLE TO DECODE
PACKAGE NOMINAL OVERALL LENGTH (NON-CORE): (PKNL) 49.63 INCHES ARMY PALLET
CARTRIDGE DESIGN TYPE: (AHUF) HIGH EXPLOSIVE INCENDIARY
QUANTITY PER SHIPPING CONTAINER: (QTSC) 100
CARTRIDGE GROUPING TYPE: (AHUG) SINGLE ROUND
CARTRIDGE MODEL NUMBER: (AHUE) M56A1
DETONATION INITIATION METHOD: (AHVN) ELECTRIC
DOD AMMUNITION CODE: (DDAC) 1305-A890
FUZE MODEL NUMBER: (AHVB) 505A1
FUZE TYPE: (AHUZ) POINT DETONATING
GROSS WEIGHT: (GRWT) 78.0 SHIPPING CONTAINER POUNDS AND 3580.0 PALLET POUNDS
HAZARDOUS MATERIAL CLASSIFICATION CODE: (HMCC) 04 INHABITED BUILDING DISTANCE AND 1.2 DEPARTMENT OF DEFENSE HAZARD CLASS DIVISION AND E STORAGE COMPATIBILITY GROUP AND I FIREFIGHTING GROUP AND I DEPARTMENT OF TRANSPORTATION CLASS AND IV COAST GUARD CLASS
MATERIAL: (MATT) COPPER ALLOY CARTRIDGE CASE
NET EXPLOSIVE WEIGHT: (EXWT) 0.0450275 SHIPBOARD POUNDS AND 0.1190000 STORAGE POUNDS AND 0.1190000 TRANSPORTATION POUNDS
PROJECTILE MODEL NUMBER: (AHUW) M56A1
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: (ZZZY) DIFFERENTIATED BY PACKAGING
TRACER ELEMENT: (AHUX) NOT INCLUDED
UNABLE TO DECODE: (AHUF) UNABLE TO DECODE
UNABLE TO DECODE: (QTSC) UNABLE TO DECODE
UNABLE TO DECODE: (SCQP) UNABLE TO DECODE
WEAPON FOR WHICH DESIGNED: (AHVQ) GUN, CANNON M39 AND GUN M39A1 AND GUN, CANNON M39A2 AND GUN M61
UNABLE TO DECODE: (PKNW) UNABLE TO DECODE
CARTRIDGE CASE MATERIAL: (AHUR) BRASS
UNABLE TO DECODE: (MRKC) UNABLE TO DECODE
UNABLE TO DECODE: (AGXZ) UNABLE TO DECODE
UNIT PACKAGE TYPE (NON-CORE): (AGXZ) ERR-070
UNABLE TO DECODE: (AHUG) UNABLE TO DECODE
PACKAGE NOMINAL OVERALL WIDTH (NON-CORE): (PKNW) ERR-070
PROJECTILE FILLER TYPE: (AHUS) MOX-2B AND RDX
UNABLE TO DECODE: (AJYJ) UNABLE TO DECODE
DOT MARKING CODE (NON-CORE): (MRKC) AK
III QUANTITY PER SHIPPING CONTAINER: (QTSC) 100
UNABLE TO DECODE: (SERN) UNABLE TO DECODE
PROJECTILE FILLER TYPE: (AHUS) MOX-2B AND RDXMOX-2B AND RDXMOX-2B AND RDX
III HAZARDOUS MATERIAL CLASSIFICATION CODE: (HMCC) 04 INHABITED BUILDING DISTANCE AND 1.2 DEPARTMENT OF DEFENSE HAZARD CLASS DIVISION AND E STORAGE COMPATIBILITY GROUP AND I FIREFIGHTING GROUP AND I DEPARTMENT OF TRANSPORTATION CLASS AND IV COAST GUARD CLASS
UNABLE TO DECODE: (PKRN) UNABLE TO DECODE
PACKAGE MODEL NUMBER (NON-CORE): (AJYJ) ERR-070
DOT LABEL CODE (NON-CORE): (LBLC) I
UNABLE TO DECODE: (AGUC) UNABLE TO DECODE
III GROSS WEIGHT: (GRWT) 78.0 SHIPPING CONTAINER POUNDS AND 3580.0 PALLET POUNDS
WEAPON FOR WHICH DESIGNED: (AHVQ) GUNS M39,M39A1,M39A2,M61
III NET EXPLOSIVE WEIGHT: (EXWT) 0.0450275 SHIPBOARD POUNDS AND 0.1190000 STORAGE POUNDS AND 0.1190000 TRANSPORTATION POUNDS
PACKAGE NOMINAL OVERALL LENGTH (NON-CORE): (PKNL) 18.59 INCHES SHIPPING CONTAINER