The Washer,key, cataloged under National Stock Number 5310-00-927-9641, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Librascope Corporation. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-927-9641 |
| Primary Part Number | BUWEPSDWG2548071 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lockheed Martin Librascope Corporation |
| Status | ACTIVE |
| Internal Straight Key Width | 0.059 INCHES MINIMUM AND 0.061 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 0.156 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Distance From Centerline to Inside of Prebent Key | 0.406 INCHES MINIMUM AND 0.416 INCHES MAXIMUM IN |
| External Prebent Key Length | 0.086 INCHES MINIMUM AND 0.092 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 0.749 INCHES MINIMUM AND 0.759 INCHES MAXIMUM IN |
| Heat Treatment | HOT ROLLED OR COLD DRAWN 1/2 HARD CONDITION |
| Style Designator | KEY |
| Outside Diameter | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN |
| Material Thickness | 0.026 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| External Prebent Key Width | 0.117 INCHES MINIMUM AND 0.123 INCHES MAXIMUM IN |
| Hole Diameter | 0.375 INCHES MINIMUM AND 0.379 INCHES MAXIMUM IN |
| 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 |
|---|---|
| BUWEPSDWG2548071 PRIMARY | Lockheed Martin Librascope Corporation (USA) |
| Reference | Meaning |
|---|---|
| 2548071 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| WS17002 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 5310-00-927-9641 is a Washer,key, manufactured by Lockheed Martin Librascope Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-927-9641 has 1 manufacturer part number on file: BUWEPSDWG2548071 (Lockheed Martin Librascope Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5975-01-051-5039. Verify interchangeability with system specifications before substitution.
Key specifications for BUWEPSDWG2548071: Internal Straight Key Width: 0.059 INCHES MINIMUM AND 0.061 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 0.156 INCHES MINIMUM AND 0.160 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Distance From Centerline to Inside of Prebent Key: 0.406 INCHES MINIMUM AND 0.416 INCHES MAXIMUM IN. 13 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.