The Washer,key, cataloged under National Stock Number 5310-01-057-4284, 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13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-057-4284 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-16232 TY2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Internal Prebent Key Width | 0.340 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 4.970 INCHES MINIMUM AND 5.000 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 4.406 INCHES MINIMUM AND 4.426 INCHES MAXIMUM IN |
| Material Thickness | 0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN |
| External Key Quantity | 19 |
| Internal Prebent Key Length | 0.250 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Surface Treatment | PHOSPHATE OVERALL |
| External Prebent Key Width | 0.297 INCHES MINIMUM AND 0.327 INCHES MAXIMUM IN |
| Material | STEEL COMP 8735 OVERALL |
| Hole Diameter | 3.988 INCHES MINIMUM AND 4.018 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 |
|---|---|
| MS19069A20 | 2/2 Government specification standardization U.S. Government activity |
NSN 5310-01-057-4284 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-057-4284: Surface Treatment Document and Classification: MIL-C-16232 TY2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Internal Prebent Key Width: 0.340 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN; Overall Distance Including Keys: 4.970 INCHES MINIMUM AND 5.000 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.