The Washer,lock, cataloged under National Stock Number 5310-00-138-7758, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is General Dynamics Land Systems - Canadacorporation Div General Dynamics Mission Systems. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 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.
| Parameter | Value |
|---|---|
| NSN | 5310-00-138-7758 |
| Primary Part Number | 904903-6 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | General Dynamics Land Systems - Canadacorporation Div General Dynamics Mission Systems |
| Status | ACTIVE |
| Heat Treatment | AS FABRICATED |
| Style Designator | SPLIT HELICAL-RIGHT HAND |
| Outside Diameter | 0.209 INCHES MAXIMUM IN |
| Material Thickness | 0.025 INCHES MINIMUM IN |
| Color | BLACK OVERALL |
| Surface Treatment | OXIDE FILM OVERALL |
| Hole Diameter | 0.115 INCHES MINIMUM AND 0.121 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 |
NSN 5310-00-138-7758 is a Washer,lock, manufactured by General Dynamics Land Systems - Canadacorporation Div General Dynamics Mission Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-138-7758 has 2 manufacturer part numbers on file: 852146 (General Dynamics Land Systems - Canadacorporation Div General Dynamics Mission Systems), 904903-6 (General Dynamics Land Systems - Canadacorporation Div General Dynamics Mission Systems).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-159-5619. Verify interchangeability with system specifications before substitution.
Key specifications for 904903-6: Heat Treatment: AS FABRICATED; Style Designator: SPLIT HELICAL-RIGHT HAND; Outside Diameter: 0.209 INCHES MAXIMUM IN; Material Thickness: 0.025 INCHES MINIMUM IN. 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.