The Washer,key, cataloged under National Stock Number 5310-00-656-0407, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5310-00-656-0407 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | CANCELLED |
| Internal Prebent Key Width | 0.313 INCHES MINIMUM AND 0.353 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 4.625 INCHES NOMINAL IN |
| Style Designator | KEY |
| Outside Diameter | 4.031 INCHES MINIMUM AND 4.061 INCHES MAXIMUM IN |
| Material Thickness | 0.072 INCHES NOMINAL IN |
| External Key Quantity | 19 |
| Internal Prebent Key Length | 0.188 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OR ZINC OR CHROMATE OVERALL |
| External Prebent Key Width | 0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Hole Diameter | 3.395 INCHES MINIMUM AND 3.425 INCHES MAXIMUM IN |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MS19070-172 | 2/2 Government specification standardization U.S. Government activity |
| 12Z335-248 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 5310006560407 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 712089 | 5/9 Secondary reference Army Weapons Command Attn Amswe-Ree-S |
NSN 5310-00-656-0407 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: cancelled.
1 possible match (shared part number, not a government interchangeability claim): 5935-01-394-2128. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-656-0407: Internal Prebent Key Width: 0.313 INCHES MINIMUM AND 0.353 INCHES MAXIMUM IN; Overall Distance Including Keys: 4.625 INCHES NOMINAL IN; Style Designator: KEY; Outside Diameter: 4.031 INCHES MINIMUM AND 4.061 INCHES MAXIMUM IN. 11 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.
NSN 5310-00-656-0407 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.