The Differential, cataloged under National Stock Number 1287-00-587-7239, is classified within Federal Supply Class 1287 (Fire Control Sonar Equipment) of the Fire Control Equipment group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Mitchel Field. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Differential |
| FSC / FSG | 1287 — Fire Control Sonar Equipment (FSG 12) |
| Manufacturers | Lockheed Martin Corporation Div Rms - Mitchel Field (CAGE 56232) |
| Parameter | Value |
|---|---|
| NSN | 1287-00-587-7239 |
| Primary Part Number | 632433 |
| Item Name | Differential |
| FSC / FSG | 1287 / 12 — Fire Control Sonar Equipment |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 632433 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| Reference | Meaning |
|---|---|
| 2003131 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 1287-00-587-7239 is a Differential, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 1287, Fire Control Sonar Equipment. Status: active.
NSN 1287-00-587-7239 has 1 manufacturer part number on file: 632433 (Lockheed Martin Corporation Div Rms - Mitchel Field).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-433-2171. Verify interchangeability with system specifications before substitution.
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 1287-00-587-7239 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.