The Washer,key, cataloged under National Stock Number 5310-00-678-9544, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-678-9544 |
| Primary Part Number | 304462 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Distance From Centerline to Inside of Prebent Key | 0.325 INCHES MINIMUM AND 0.335 INCHES MAXIMUM IN |
| Split Key Length | 0.175 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN |
| External Prebent Key Length | 0.118 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | AMS5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.546 INCHES MINIMUM AND 0.556 INCHES MAXIMUM IN |
| External Tapered Key Width | 0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| Material Thickness | 0.034 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN |
| External Key Quantity | 1 |
| External Prebent Key Angle | 30.0 DEGREES NOMINAL |
| External Prebent Key Width | 0.140 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN |
| Material | STEEL COMP 321 OVERALL |
| Angle Between External Keys | 60.0 DEGREES NOMINAL |
| Hole Diameter | 0.390 INCHES MINIMUM AND 0.395 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 |
NSN 5310-00-678-9544 is a Washer,key, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-678-9544 has 2 manufacturer part numbers on file: 304462 (Tokyo Judoi Kogyo K.k.), 304462 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
1 possible match (shared part number, not a government interchangeability claim): 3040-00-753-8734. Verify interchangeability with system specifications before substitution.
Key specifications for 304462: Distance From Centerline to Inside of Prebent Key: 0.325 INCHES MINIMUM AND 0.335 INCHES MAXIMUM IN; Split Key Length: 0.175 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN; External Prebent Key Length: 0.118 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN; Overall Distance Including Keys: 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN. 15 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.