The Cartridge,20 Millimeter, cataloged under National Stock Number 1305-00-239-5937, is classified within Federal Supply Class 1305 (Ammunition, Through 30mm) of the Ammunition and Explosives group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1305-00-239-5937 |
| Item Name | Cartridge,20 Millimeter |
| FSC / FSG | 1305 / 13 — Ammunition, Through 30mm |
| Status | ACTIVE |
| Weapon for Which Designed | GUN, CANNON M39A2 |
| Cartridge Grouping Functional Sequence | 4-1 |
| Cartridge Quantity | 100 |
| Net Explosive Weight | 0.124 STORAGE POUNDS AND 0.124 TRANSPORTATION POUNDS |
| Dot Proper Shipping Name | CARTRIDGES FOR WEAPONS, INERT PROJECTILE |
| Projectile Filler Type | TRACER COMPOSITION PACK BARREL |
| Dot Identification Number | UN0339 |
| Unable to Decode | UNABLE TO DECODE |
| Dot Registration Code | EX1988120396 |
| Projectile Model Number | M55A2 CLIPPED |
| Projectile Model Number | XM221E1 PACK BARREL |
| Cartridge Model Number | M55A2 CLIPPED |
| Cartridge Model Number | XM220E1 PACK BARREL |
| Dod Ammunition Code | 1305-A802 |
| Detonation Initiation Method | ELECTRIC |
| Hazardous Material Classification Code | 1.4 DEPARTMENT OF DEFENSE HAZARD CLASS DIVISION |
| Link Model Number | M12 |
| Material | COPPER ALLOY CARTRIDGE CASE PACK BARREL |
| Material | COPPER ALLOY CARTRIDGE CASE CLIPPED |
| Reference Number Differentiating Characteristics | AHUG,AHUF,AHUZ,AHUR,AHUE,AHUW,AHUS,AHUH,AHUP,AHUL,AGUC,AGXZ,AJYJ |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL G — Ammunition & Explosives |
| Hazard | No hazard code in the DLA record (HMIC N) UN ID UN0339 · 1.4 DEPARTMENT OF DEFENSE HAZARD CLASS DIVISION · ships as CARTRIDGES FOR WEAPONS, INERT PROJECTILE |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 1305-A802 | 6/9 Informative reference only U.S. Government activity |
| 7258817AND7259146 | 3/9 Design control — primary reference Lake City Army Ammunition Plant Attn Ammunition Technology Laboratory |
| M55A2ANDXM220E1 | 5/9 Secondary reference Lake City Army Ammunition Plant Attn Ammunition Technology Laboratory |
NSN 1305-00-239-5937 is a Cartridge,20 Millimeter, classified under FSC 1305, Ammunition, Through 30mm. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 1305-00-926-9421. Verify interchangeability with system specifications before substitution.
Key specifications for 1305-00-239-5937: Weapon for Which Designed: GUN, CANNON M39A2; Cartridge Grouping Functional Sequence: 4-1; Cartridge Quantity: 100; Net Explosive Weight: 0.124 STORAGE POUNDS AND 0.124 TRANSPORTATION POUNDS. 20 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). The government record also carries hazard data: DOT hazard class, UN number, or related classification fields. Special handling, storage, and shipping requirements apply per the cited government fields.
NSN 1305-00-239-5937 has DEMIL Code G. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.