The Washer,key, cataloged under National Stock Number 5310-01-628-1376, 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12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-628-1376 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Internal Straight Key Width | 0.043 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 0.0925 INCHES MINIMUM AND 0.0955 INCHES MAXIMUM IN |
| Distance From Centerline to Inside of Prebent Key | 0.199 INCHES NOMINAL IN |
| External Prebent Key Length | 0.050 INCHES NOMINAL IN |
| Overall Distance Including Keys | 0.462 INCHES NOMINAL IN |
| Style Designator | KEY |
| Material Document and Classification | PER QQ-S-698 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.398 INCHES NOMINAL IN |
| Material Thickness | 0.027 INCHES MINIMUM AND 0.033 INCHES MAXIMUM IN |
| External Prebent Key Width | 0.62 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Hole Diameter | 0.255 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 |
|---|---|
| MS25081-0 | 2/2 Government specification standardization U.S. Government activity |
NSN 5310-01-628-1376 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-628-1376: Internal Straight Key Width: 0.043 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 0.0925 INCHES MINIMUM AND 0.0955 INCHES MAXIMUM IN; Distance From Centerline to Inside of Prebent Key: 0.199 INCHES NOMINAL IN; External Prebent Key Length: 0.050 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.