The Washer,key, cataloged under National Stock Number 5310-01-031-4856, 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12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-031-4856 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Heat Treatment | ANNEALED |
| Hardness Rating | 53.0 ROCKWELL C MINIMUM AND 57.0 ROCKWELL C MAXIMUM |
| Style Designator | KEY |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.747 INCHES MINIMUM AND 0.753 INCHES MAXIMUM IN |
| Material Thickness | 0.093 INCHES NOMINAL IN |
| External Straight Key Width | 0.156 INCHES NOMINAL IN |
| Distance From Centerline to End of Key | 0.500 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 440C OVERALL |
| Hole Diameter | 0.252 INCHES MINIMUM AND 0.253 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 |
|---|---|
| SM-B-630954 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-031-4856 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-031-4856: Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Heat Treatment: ANNEALED; Hardness Rating: 53.0 ROCKWELL C MINIMUM AND 57.0 ROCKWELL C MAXIMUM; Style Designator: KEY. 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.