The Stop,breechblock, cataloged under National Stock Number 1020-01-507-1683, is classified within Federal Supply Class 1020 (Guns, Over 125mm Through 150mm) of the Weapons group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1020-01-507-1683 |
| Primary Part Number | 7251241 |
| Item Name | Stop,breechblock |
| FSC / FSG | 1020 / 10 — Guns, Over 125mm Through 150mm |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Criticality Code Justification | FEAT |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 7251241 PRIMARY | Naval Sea Systems Command (USA) |
NSN 1020-01-507-1683 is a Stop,breechblock, manufactured by Naval Sea Systems Command, classified under FSC 1020, Guns, Over 125mm Through 150mm. Status: active.
NSN 1020-01-507-1683 has 1 manufacturer part number on file: 7251241 (Naval Sea Systems Command).
Key specifications for 7251241: Criticality Code Justification: FEAT; Overall Length: 6.437 INCHES NOMINAL IN; Special Features: WEAPON SYSTEM ESSENTIAL; STOP BRACKET; End Item Identification: GUN MOUNT, MK32 MOD2. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 1020-01-507-1683 has DEMIL Code D. 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.