The Washer,keyway, cataloged under National Stock Number 5310-00-973-0253, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-973-0253 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Distance From Centerline to Bottom of Internal Keyway | 0.637 INCHES MINIMUM AND 0.642 INCHES MAXIMUM IN |
| Internal Keyway Width | 0.127 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.970 INCHES NOMINAL IN |
| Internal Keyway Quantity | 1 |
| Material Thickness | 0.228 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN |
| Material | STEEL COMP 303 OVERALL |
| Hole Diameter | 0.999 INCHES MINIMUM AND 1.000 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 |
|---|---|
| B8005-08-002FN4 | 5/9 Secondary reference U.S. Government activity |
| V08-002-004 | 3/2 Design control — primary reference U.S. Government activity |
| V08-002-004 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-00-973-0253 is a Washer,keyway, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-973-0253: Distance From Centerline to Bottom of Internal Keyway: 0.637 INCHES MINIMUM AND 0.642 INCHES MAXIMUM IN; Internal Keyway Width: 0.127 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN; Material Document and Classification: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.970 INCHES NOMINAL IN. 8 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.