The Washer,key, cataloged under National Stock Number 5310-00-073-1601, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-073-1601 |
| Primary Part Number | 481737 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES TOP |
| Distance From Centerline to Inside of Prebent Key | 0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN |
| Split Key Length | 0.150 INCHES MINIMUM AND 0.155 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 0.640 INCHES MINIMUM AND 0.660 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | SAE 30321 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| External Tapered Key Width | 0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN |
| Material Thickness | 0.027 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN |
| External Key Quantity | 4 |
| External Prebent Key Angle | 20.0 DEGREES MINIMUM AND 40.0 DEGREES MAXIMUM |
| External Prebent Key Width | 0.190 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Angle Between External Keys | 38.0 DEGREES MINIMUM AND 42.0 DEGREES MAXIMUM |
| Hole Diameter | 0.200 INCHES MINIMUM AND 0.205 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 | F |
| Part Number | Manufacturer |
|---|---|
| 481737 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 481737 | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 481737 | 5/9 Secondary reference Alinabal Holdings Corporation Div Engineered Products Group |
| 481737 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 5310-00-073-1601 is a Washer,key, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-073-1601 has 2 manufacturer part numbers on file: 481737 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 481737 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 481737: Surface Finish: 32.0 MICROINCHES TOP; Distance From Centerline to Inside of Prebent Key: 0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN; Split Key Length: 0.150 INCHES MINIMUM AND 0.155 INCHES MAXIMUM IN; Overall Distance Including Keys: 0.640 INCHES MINIMUM AND 0.660 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.