The Washer,key, cataloged under National Stock Number 5310-00-403-7654, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lee Co the J B T Div. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-403-7654 |
| Primary Part Number | WR1-12 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lee Co the J B T Div |
| Status | ACTIVE |
| Internal Straight Key Width | 0.059 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN |
| Distance From Centerline to Top of Internal Key | 0.149 INCHES MINIMUM AND 0.165 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| External Prebent Key Length | 0.050 INCHES NOMINAL IN |
| Overall Distance Including Keys | 0.476 INCHES MINIMUM AND 0.492 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Outside Diameter | 0.452 INCHES MINIMUM AND 0.484 INCHES MAXIMUM IN |
| Material Thickness | 0.037 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN |
| External Key Quantity | 1 |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| External Prebent Key Width | 0.110 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Internal Key Quantity | 1 |
| Hole Diameter | 0.250 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 |
|---|---|
| WR1-12 PRIMARY | Lee Co the J B T Div (USA) |
| Reference | Meaning |
|---|---|
| F57691 | 5/9 Secondary reference U.S. Government activity |
| WR1-12 | 5/9 Secondary reference Eaton Corp Aerospace and Commercial Controls Div Jbt Products |
NSN 5310-00-403-7654 is a Washer,key, manufactured by Lee Co the J B T Div, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-403-7654 has 1 manufacturer part number on file: WR1-12 (Lee Co the J B T Div).
3 possible matches (shared part number, not a government interchangeability claim): 6625-00-470-8439, 5985-01-040-4157, 5985-01-545-0225. Verify interchangeability with system specifications before substitution.
Key specifications for WR1-12: Internal Straight Key Width: 0.059 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN; Distance From Centerline to Top of Internal Key: 0.149 INCHES MINIMUM AND 0.165 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; External Prebent Key Length: 0.050 INCHES NOMINAL IN. 14 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.