The Washer,key, cataloged under National Stock Number 5310-01-137-8982, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-137-8982 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | TT-C-490,TYPE 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Distance From Centerline to Inside of Prebent Key | 0.315 INCHES NOMINAL IN |
| External Prebent Key Length | 0.159 INCHES NOMINAL IN |
| Overall Distance Including Keys | 0.719 INCHES NOMINAL IN |
| Style Designator | KEY |
| Outside Diameter | 0.625 INCHES NOMINAL IN |
| Material Thickness | 0.060 INCHES NOMINAL IN |
| External Straight Key Width | 0.125 INCHES NOMINAL IN |
| Surface Treatment | ZINC AND PHOSPHATE OVERALL |
| External Prebent Key Width | 0.156 INCHES NOMINAL IN |
| Material | STEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020 OVERALL |
| Hole Diameter | 0.328 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SM-B-158380 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-137-8982 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-137-8982: Surface Treatment Document and Classification: TT-C-490,TYPE 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Distance From Centerline to Inside of Prebent Key: 0.315 INCHES NOMINAL IN; External Prebent Key Length: 0.159 INCHES NOMINAL IN; Overall Distance Including Keys: 0.719 INCHES NOMINAL IN. 12 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.