The Washer,key, cataloged under National Stock Number 5310-00-787-6504, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Cummins Inc.. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 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 | 5310-00-787-6504 |
| Primary Part Number | 64489 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Cummins Inc. |
| Status | ACTIVE |
| Distance From Centerline to Inside of Prebent Key | 1.875 INCHES NOMINAL IN |
| Internal Prebent Key Width | 0.438 INCHES NOMINAL IN |
| Style Designator | KEY |
| Outside Diameter | 4.625 INCHES NOMINAL IN |
| Material Thickness | 0.062 INCHES NOMINAL IN |
| Internal Prebent Key Length | 0.219 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Hole Diameter | 3.266 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 64489 PRIMARY | Cummins Inc. (USA) |
NSN 5310-00-787-6504 is a Washer,key, manufactured by Cummins Inc., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-787-6504 has 1 manufacturer part number on file: 64489 (Cummins Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-649-5796. Verify interchangeability with system specifications before substitution.
Key specifications for 64489: Distance From Centerline to Inside of Prebent Key: 1.875 INCHES NOMINAL IN; Internal Prebent Key Width: 0.438 INCHES NOMINAL IN; Style Designator: KEY; Outside Diameter: 4.625 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.