The Washer,key, cataloged under National Stock Number 5310-01-133-5840, 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 13 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-133-5840 |
| Primary Part Number | 2181547 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Split Key Length | 0.210 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN |
| External Prebent Key Length | 0.080 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | AMS 5599 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.745 INCHES MINIMUM AND 0.755 INCHES MAXIMUM IN |
| External Tapered Key Width | 0.415 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN |
| Material Thickness | 0.0380 INCHES MINIMUM AND 0.0405 INCHES MAXIMUM IN |
| External Key Quantity | 3 |
| External Prebent Key Angle | 10.0 DEGREES MINIMUM AND 20.0 DEGREES MAXIMUM |
| External Prebent Key Width | 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| Material | NICKEL ALLOY 625 OVERALL |
| Angle Between External Keys | 58.0 DEGREES MINIMUM AND 62.0 DEGREES MAXIMUM |
| Hole Diameter | 0.525 INCHES MINIMUM AND 0.535 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 |
|---|---|
| 2181547 | Trego Inc (USA) |
| 2181547 | Satellite Aerospace, Incorporated Dba Satellite Aerospace Inc (USA) |
| 2181547 | Atlas Stamping & Manufacturing Corp Dba Atlas Stamping & Manufacturing Corp (USA) |
| 2181547 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
NSN 5310-01-133-5840 is a Washer,key, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-133-5840 has 4 manufacturer part numbers on file: 2181547 (Trego Inc), 2181547 (Satellite Aerospace, Incorporated Dba Satellite Aerospace Inc), 2181547 (Atlas Stamping & Manufacturing Corp Dba Atlas Stamping & Manufacturing Corp), 2181547 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 2181547: Split Key Length: 0.210 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN; External Prebent Key Length: 0.080 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN; Style Designator: KEY; Material Document and Classification: AMS 5599 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 13 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.