The Washer,key, cataloged under National Stock Number 5310-00-261-6860, 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11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-261-6860 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Internal Straight Key Width | 0.182 INCHES MINIMUM AND 0.182 INCHES MINIMUM AND 0.187 INCHES MAXIMUM0.187 INCHES MAXIMUM IN |
| External Straight Key Length | 0.238 INCHES NOMINAL0.238 INCHES NOMINAL IN |
| Distance From Centerline to Top of Internal Key | 0.315 INCHES MINIMUM AND 0.315 INCHES MINIMUM AND 0.317 INCHES MAXIMUM0.317 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-B-750 MIL SPEC SINGLE MATERIAL RESPONSE OVERALLQQ-B-750 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.115 INCHES MINIMUM AND 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM1.135 INCHES MAXIMUM IN |
| Material Thickness | 0.050 INCHES NOMINAL0.050 INCHES NOMINAL IN |
| External Straight Key Width | 0.115 INCHES MINIMUM AND 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM0.135 INCHES MAXIMUM IN |
| External Key Quantity | 11 |
| Material | COPPER ALLOY OVERALL |
| Internal Key Quantity | 22 |
| Hole Diameter | 0.750 INCHES MINIMUM AND 0.750 INCHES MINIMUM AND 0.760 INCHES MAXIMUM0.760 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 |
|---|---|
| 161022PC9 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 5310-00-261-6860 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-261-6860: Internal Straight Key Width: 0.182 INCHES MINIMUM AND 0.182 INCHES MINIMUM AND 0.187 INCHES MAXIMUM0.187 INCHES MAXIMUM IN; External Straight Key Length: 0.238 INCHES NOMINAL0.238 INCHES NOMINAL IN; Distance From Centerline to Top of Internal Key: 0.315 INCHES MINIMUM AND 0.315 INCHES MINIMUM AND 0.317 INCHES MAXIMUM0.317 INCHES MAXIMUM IN; Material Document and Classification: QQ-B-750 MIL SPEC SINGLE MATERIAL RESPONSE OVERALLQQ-B-750 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.
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.