The Junction Box, cataloged under National Stock Number 5975-01-663-6390, is classified within Federal Supply Class 5975 (Electrical Hardware and Supplies) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Lockheed Martin Corporation Div Rotary and Mission Systems. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 | Junction Box |
| FSC / FSG | 5975 — Electrical Hardware and Supplies (FSG 59) |
| Manufacturers | Lockheed Martin Corporation Div Rotary and Mission Systems (CAGE 16331); Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (CAGE 30003) |
| Parameter | Value |
|---|---|
| NSN | 5975-01-663-6390 |
| Primary Part Number | 4027AS1089-01 |
| Item Name | Junction Box |
| FSC / FSG | 5975 / 59 — Electrical Hardware and Supplies |
| Manufacturer | Lockheed Martin Corporation Div Rotary and Mission Systems |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4027AS1089-01 PRIMARY | Lockheed Martin Corporation Div Rotary and Mission Systems (USA) |
| 4027AS1089 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
NSN 5975-01-663-6390 is a Junction Box, manufactured by Lockheed Martin Corporation Div Rotary and Mission Systems, classified under FSC 5975, Electrical Hardware and Supplies. Status: active.
NSN 5975-01-663-6390 has 2 manufacturer part numbers on file: 4027AS1089-01 (Lockheed Martin Corporation Div Rotary and Mission Systems), 4027AS1089 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
1 possible match (shared part number, not a government interchangeability claim): 6110-01-665-3210. Verify interchangeability with system specifications before substitution.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
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.