The Washer,key, cataloged under National Stock Number 5310-00-139-6545, 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11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-139-6545 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES BOTTOM32.0 MICROINCHES BOTTOM |
| Surface Finish | 32.0 MICROINCHES TOP32.0 MICROINCHES TOP |
| Internal Straight Key Width | 0.280 INCHES MINIMUM AND 0.280 INCHES MINIMUM AND 0.290 INCHES MAXIMUM0.290 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 0.099 INCHES MINIMUM AND 0.099 INCHES MINIMUM AND 0.108 INCHES MAXIMUM0.108 INCHES MAXIMUM IN |
| Style Designator | KEYKEY |
| Material Document and Classification | QQ-S-763,COND B FED SPEC SINGLE MATERIAL RESPONSE OVERALLQQ-S-763,COND B FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.938 INCHES NOMINAL2.938 INCHES NOMINAL IN |
| Material Thickness | 0.120 INCHES MINIMUM AND 0.120 INCHES MINIMUM AND 0.125 INCHES MAXIMUM0.125 INCHES MAXIMUM IN |
| Material | STEEL COMP 304 OVERALL |
| Internal Key Quantity | 11 |
| Hole Diameter | 2.500 INCHES MINIMUM AND 2.500 INCHES MINIMUM AND 2.502 INCHES MAXIMUM2.502 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 |
|---|---|
| 420025-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-139-6545 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-700-9065. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-139-6545: Surface Finish: 32.0 MICROINCHES BOTTOM32.0 MICROINCHES BOTTOM; Surface Finish: 32.0 MICROINCHES TOP32.0 MICROINCHES TOP; Internal Straight Key Width: 0.280 INCHES MINIMUM AND 0.280 INCHES MINIMUM AND 0.290 INCHES MAXIMUM0.290 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 0.099 INCHES MINIMUM AND 0.099 INCHES MINIMUM AND 0.108 INCHES MAXIMUM0.108 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.
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.