The Washer,keyway, cataloged under National Stock Number 5310-01-012-7407, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Williams International Co., L.l.c.. Government technical data includes 7 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 | 5310-01-012-7407 |
| Primary Part Number | 25073 |
| Item Name | Washer,keyway |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Williams International Co., L.l.c. |
| Status | ACTIVE |
| Distance From Centerline to Bottom of Internal Keyway | 0.530 INCHES NOMINAL IN |
| Internal Keyway Width | 0.180 INCHES NOMINAL IN |
| Hardness Rating | 28.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM |
| Style Designator | KEYWAY |
| Material Document and Classification | 08-200,FSCM 24235 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Material Thickness | 0.035 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN |
| Hole Diameter | 0.940 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 |
|---|---|
| 25073 PRIMARY | Williams International Co., L.l.c. (USA) |
NSN 5310-01-012-7407 is a Washer,keyway, manufactured by Williams International Co., L.l.c., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-012-7407 has 1 manufacturer part number on file: 25073 (Williams International Co., L.l.c.).
1 possible match (shared part number, not a government interchangeability claim): 4720-01-540-6271. Verify interchangeability with system specifications before substitution.
Key specifications for 25073: Distance From Centerline to Bottom of Internal Keyway: 0.530 INCHES NOMINAL IN; Internal Keyway Width: 0.180 INCHES NOMINAL IN; Hardness Rating: 28.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM; Style Designator: KEYWAY. 7 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.