The Washer,key, cataloged under National Stock Number 5310-00-325-0718, 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 9 specifications, cited from the U.S. Government catalog. The record lists 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-325-0718 |
| Primary Part Number | 450250 |
| 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 | 0.735 INCHES MINIMUM AND 0.745 INCHES MAXIMUM IN |
| Internal Prebent Key Width | 0.237 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5040 ASSN STD ALL MATERIAL RESPONSES OR AMS 5042 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 2.062 INCHES MINIMUM AND 2.086 INCHES MAXIMUM IN |
| Material Thickness | 0.027 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN |
| Internal Prebent Key Length | 0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN |
| Material | STEEL COMP 1010 OVERALL |
| Internal Key Quantity | 1 |
| Hole Diameter | 1.690 INCHES MINIMUM AND 1.710 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 |
|---|---|
| 450250 | Beta Engineering, Inc. Dba Beta Engineering Inc (USA) |
| 450250 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 450250 | Hanwha Aerospace Usa Llc Div Edac Nd, Inc. (USA) |
| 450250 | Dcp Spring Acquisition Company, Inc. Dba New England Spring Div New England Spring (USA) |
| 450250 | Numet Acquisition Inc (USA) |
| 450250 | Alinabal Holdings Corporation Div Engineered Products Group (USA) |
| 450250 | Electro-Methods, L.p. (USA) |
| 450250 | Enjet Aero Bloomfield, Llc (USA) |
| Reference | Meaning |
|---|---|
| 450250 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-00-325-0718 is a Washer,key, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-325-0718 has 8 manufacturer part numbers on file: 450250 (Beta Engineering, Inc. Dba Beta Engineering Inc), 450250 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 450250 (Hanwha Aerospace Usa Llc Div Edac Nd, Inc.), 450250 (Dcp Spring Acquisition Company, Inc. Dba New England Spring Div New England Spring), 450250 (Numet Acquisition Inc) and 3 more.
1 possible match (shared part number, not a government interchangeability claim): 5935-01-595-1446. Verify interchangeability with system specifications before substitution.
Key specifications for 450250: Distance From Centerline to Inside of Prebent Key: 0.735 INCHES MINIMUM AND 0.745 INCHES MAXIMUM IN; Internal Prebent Key Width: 0.237 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN; Material Document and Classification: AMS 5040 ASSN STD ALL MATERIAL RESPONSES OR AMS 5042 ASSN STD ALL MATERIAL RESPONSES OVERALL; Outside Diameter: 2.062 INCHES MINIMUM AND 2.086 INCHES MAXIMUM IN. 9 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.