The Module Assembly, cataloged under National Stock Number 1220-00-920-8457, is classified within Federal Supply Class 1220 (Fire Control Computing Sights and Devices) of the Fire Control Equipment group. The manufacturer of record is Lockheed Martin Librascope Corporation. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1220-00-920-8457 |
| Primary Part Number | BUWEPSDWG2424591 |
| Item Name | Module Assembly |
| FSC / FSG | 1220 / 12 — Fire Control Computing Sights and Devices |
| Manufacturer | Lockheed Martin Librascope Corporation |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| BUWEPSDWG2424591 PRIMARY | Lockheed Martin Librascope Corporation (USA) |
| Reference | Meaning |
|---|---|
| 2424591 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 1220-00-920-8457 is a Module Assembly, manufactured by Lockheed Martin Librascope Corporation, classified under FSC 1220, Fire Control Computing Sights and Devices. Status: active.
NSN 1220-00-920-8457 has 1 manufacturer part number on file: BUWEPSDWG2424591 (Lockheed Martin Librascope Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5910-01-235-0364. Verify interchangeability with system specifications before substitution.
Key specifications for BUWEPSDWG2424591: End Item Identification: MK75MOD2,DIRECTOR,ATTACK. 0 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 1220-00-920-8457 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.