The Washer,keyway, cataloged under National Stock Number 5310-00-451-0631, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Prestolite Electric Inc. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-451-0631 |
| Primary Part Number | 59225 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Prestolite Electric Inc |
| Status | ACTIVE |
| External Keyway Width | 0.188 INCHES NOMINAL IN |
| Outside Diameter | 1.375 INCHES NOMINAL IN |
| Material Thickness | 0.187 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN |
| Hole Diameter | 0.876 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN |
| External Keyway Length | 0.497 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 |
NSN 5310-00-451-0631 is a Washer,keyway, manufactured by Prestolite Electric Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-451-0631 has 2 manufacturer part numbers on file: 6AX158 (Oshkosh Defense Llc), 59225 (Prestolite Electric Inc).
2 possible matches (shared part number, not a government interchangeability claim): 7520-01-434-0038, 5120-01-449-7190. Verify interchangeability with system specifications before substitution.
Key specifications for 59225: External Keyway Width: 0.188 INCHES NOMINAL IN; Outside Diameter: 1.375 INCHES NOMINAL IN; Material Thickness: 0.187 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN; Special Features: KEYWAY 0.070 IN. DEEP IN. 5 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.