The Washer,key, cataloged under National Stock Number 5310-00-043-0787, 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11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-043-0787 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES BOTTOM |
| Surface Finish | 63.0 MICROINCHES TOP |
| Distance From Centerline to Inside of Prebent Key | 0.322 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN |
| Internal Prebent Key Width | 0.075 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN |
| Heat Treatment | AS FABRICATED |
| Style Designator | KEY |
| Outside Diameter | 0.980 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN |
| Material Thickness | 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN |
| Internal Prebent Key Length | 0.050 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN |
| Material | STEEL COMP 347 OVERALL |
| Hole Diameter | 0.505 INCHES MINIMUM AND 0.515 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 |
|---|---|
| 616754 | 3/9 Design control — primary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 616754 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
NSN 5310-00-043-0787 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5365-00-567-6968. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-043-0787: Surface Finish: 63.0 MICROINCHES BOTTOM; Surface Finish: 63.0 MICROINCHES TOP; Distance From Centerline to Inside of Prebent Key: 0.322 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN; Internal Prebent Key Width: 0.075 INCHES MINIMUM AND 0.085 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.