The Washer,key, cataloged under National Stock Number 5310-00-209-3718, 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12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-209-3718 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Internal Prebent Key Width | 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 1.720 INCHES NOMINAL IN |
| Style Designator | KEY |
| Material Document and Classification | MIL-S-7809 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.27125 INCHES MINIMUM AND 1.29125 INCHES MAXIMUM IN |
| Material Thickness | 0.050 INCHES NOMINAL IN |
| External Key Quantity | 6 |
| Internal Prebent Key Length | 0.09375 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OR ZINC OVERALL |
| External Prebent Key Width | 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Hole Diameter | 0.999 INCHES MINIMUM AND 1.004 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 |
|---|---|
| 37B299C05 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5310-00-209-3718 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-209-3718: Internal Prebent Key Width: 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN; Overall Distance Including Keys: 1.720 INCHES NOMINAL IN; Style Designator: KEY; Material Document and Classification: MIL-S-7809 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.