The Lampholder, cataloged under National Stock Number 6250-00-243-7674, is classified within Federal Supply Class 6250 (Ballasts, Lampholders, and Starters) of the Lighting Fixtures and Lamps group. The manufacturer of record is Grimes Aerospace Company. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6250-00-243-7674 |
| Primary Part Number | A4991 |
| Item Name | Lampholder |
| FSC / FSG | 6250 / 62 — Ballasts, Lampholders, and Starters |
| Manufacturer | Grimes Aerospace Company |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416, TYPE 2, CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE SHELL |
| Mounting Method | EXTERNAL THREADED LOCATION NOT OTHERWISE SPECIFIED |
| Material Document and Classification | QQ-B-626, COMP 22 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-B-626, COMP 22 FED SPEC SINGLE MATERIAL RESPONSE SHELL |
| Surface Treatment | CADMIUM AND CHROMATE SHELL |
| Material | COPPER ALLOY 360 BODY |
| Material | COPPER ALLOY 360 SHELL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A4991 PRIMARY | Grimes Aerospace Company (USA) |
| Reference | Meaning |
|---|---|
| A4991-1 | 5/9 Secondary reference Grimes Aerospace Company |
NSN 6250-00-243-7674 is a Lampholder, manufactured by Grimes Aerospace Company, classified under FSC 6250, Ballasts, Lampholders, and Starters. Status: active.
NSN 6250-00-243-7674 has 1 manufacturer part number on file: A4991 (Grimes Aerospace Company).
3 possible matches (shared part number, not a government interchangeability claim): 5930-00-259-8609, 6130-01-203-6695, 5915-01-277-6039. Verify interchangeability with system specifications before substitution.
Key specifications for A4991: Surface Treatment Document and Classification: QQ-P-416, TYPE 2, CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE SHELL; Mounting Method: EXTERNAL THREADED LOCATION NOT OTHERWISE SPECIFIED; Material Document and Classification: QQ-B-626, COMP 22 FED SPEC SINGLE MATERIAL RESPONSE BODY; Material Document and Classification: QQ-B-626, COMP 22 FED SPEC SINGLE MATERIAL RESPONSE SHELL. 7 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.
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.