The Washer,keyway, cataloged under National Stock Number 5310-01-213-3666, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-213-3666 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Distance From Centerline to Bottom of Internal Keyway | 0.227 INCHES MINIMUM AND 0.238 INCHES MAXIMUM IN |
| Internal Keyway Width | 0.148 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | QQ-A-250/4,T4 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/5,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN |
| Material Thickness | 0.238 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Hole Diameter | 0.380 INCHES MINIMUM AND 0.390 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 |
|---|---|
| MS21126-6 | 2/2 Government specification standardization U.S. Government activity |
NSN 5310-01-213-3666 is a Washer,keyway, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-213-3666: Distance From Centerline to Bottom of Internal Keyway: 0.227 INCHES MINIMUM AND 0.238 INCHES MAXIMUM IN; Internal Keyway Width: 0.148 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Material Document and Classification: QQ-A-250/4,T4 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/5,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 9 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.