The Washer,key, cataloged under National Stock Number 5310-00-905-2500, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-905-2500 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | AMS 2481 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Internal Prebent Key Width | 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 1.954 INCHES MINIMUM AND 1.984 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | AMS 6350 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.562 INCHES MINIMUM AND 1.582 INCHES MAXIMUM IN |
| Material Thickness | 0.046 INCHES MINIMUM AND 0.054 INCHES MAXIMUM IN |
| External Key Quantity | 15 |
| Internal Prebent Key Length | 0.094 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN |
| Surface Treatment | PHOSPHATE OVERALL |
| External Prebent Key Width | 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN |
| Material | STEEL COMP 4130 OVERALL |
| Hole Diameter | 1.082 INCHES MINIMUM AND 1.102 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 |
| Reference | Meaning |
|---|---|
| MS172280 | 2/2 Government specification standardization U.S. Government activity |
NSN 5310-00-905-2500 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-905-2500: Surface Treatment Document and Classification: AMS 2481 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Internal Prebent Key Width: 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN; Overall Distance Including Keys: 1.954 INCHES MINIMUM AND 1.984 INCHES MAXIMUM IN; Style Designator: KEY. 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.