The Washer,key, cataloged under National Stock Number 5310-00-941-0158, 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 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-941-0158 |
| Primary Part Number | 475493 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Internal Prebent Key Width | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 4.310 INCHES MINIMUM AND 4.320 INCHES MAXIMUM IN |
| Style Designator | EXTERNAL AND INTERNAL PRE-BENT KEYS |
| Material Document and Classification | AMS5040 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5042 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 4.263 INCHES MINIMUM AND 4.281 INCHES MAXIMUM IN |
| Material Thickness | 0.039 INCHES MINIMUM AND 0.047 INCHES MAXIMUM IN |
| External Key Quantity | 18 |
| Internal Prebent Key Length | 0.260 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN |
| External Prebent Key Width | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Material | STEEL OVERALL |
| Internal Key Quantity | 5 |
| Hole Diameter | 4.100 INCHES MINIMUM AND 4.200 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 |
| Part Number | Manufacturer |
|---|---|
| 475493 | The United Tool & Die Company (USA) |
| 475493 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 475493 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 475493 | 5/9 Secondary reference Reed Tool Co Diamond Metal Alloys Div |
NSN 5310-00-941-0158 is a Washer,key, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-941-0158 has 2 manufacturer part numbers on file: 475493 (The United Tool & Die Company), 475493 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 475493: Internal Prebent Key Width: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN; Overall Distance Including Keys: 4.310 INCHES MINIMUM AND 4.320 INCHES MAXIMUM IN; Style Designator: EXTERNAL AND INTERNAL PRE-BENT KEYS; Material Document and Classification: AMS5040 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5042 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 12 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.