The Washer,key, cataloged under National Stock Number 5310-00-256-3084, 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13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-256-3084 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Internal Prebent Key Width | 0.059 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 1.062 INCHES NOMINAL IN |
| Heat Treatment | H-32 STRAIN HARDENED, STABILIZED TO 1/4 HARD |
| Style Designator | KEY |
| Outside Diameter | 0.750 INCHES NOMINAL IN |
| Material Thickness | 0.032 INCHES NOMINAL IN |
| External Straight Key Width | 0.125 INCHES NOMINAL IN |
| External Key Quantity | 10 |
| Internal Prebent Key Length | 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY 5052 OVERALL |
| Hole Diameter | 0.626 INCHES MINIMUM AND 0.636 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 |
|---|---|
| 2531940 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 5310-00-256-3084 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-256-3084: Surface Treatment Document and Classification: MIL-A-8625,TYPE 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Internal Prebent Key Width: 0.059 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN; Overall Distance Including Keys: 1.062 INCHES NOMINAL IN; Heat Treatment: H-32 STRAIN HARDENED, STABILIZED TO 1/4 HARD. 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.