The Washer,key, cataloged under National Stock Number 5310-01-248-2201, 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 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-248-2201 |
| Primary Part Number | 776928 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Overall Distance Including Keys | 0.570 INCHES MINIMUM AND 0.570 INCHES MINIMUM AND 0.585 INCHES MAXIMUM0.585 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | AMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.440 INCHES MINIMUM AND 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM0.450 INCHES MAXIMUM IN |
| Material Thickness | 0.028 INCHES MINIMUM AND 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM0.036 INCHES MAXIMUM IN |
| External Key Quantity | 22 |
| Material | STEEL COMP 321 OVERALL |
| Angle Between External Keys | 80.0 DEGREES NOMINAL80.0 DEGREES NOMINAL |
| Tapered Key Major Width | 0.125 INCHES MINIMUM AND 0.125 INCHES MINIMUM AND 0.130 INCHES MAXIMUM0.130 INCHES MAXIMUM IN |
| Hole Diameter | 0.255 INCHES MINIMUM AND 0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM0.260 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 |
|---|---|
| 776928 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
NSN 5310-01-248-2201 is a Washer,key, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-248-2201 has 1 manufacturer part number on file: 776928 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 776928: Overall Distance Including Keys: 0.570 INCHES MINIMUM AND 0.570 INCHES MINIMUM AND 0.585 INCHES MAXIMUM0.585 INCHES MAXIMUM IN; Style Designator: KEY; Material Document and Classification: AMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.440 INCHES MINIMUM AND 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM0.450 INCHES MAXIMUM IN. 10 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.