The Washer,key, cataloged under National Stock Number 5310-00-367-8770, 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 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-367-8770 |
| Primary Part Number | 4007021 |
| 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 | 1.710 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM |
| Material Document and Classification | AMS5596 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.360 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN |
| Material Thickness | 0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN |
| External Straight Key Width | 0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN |
| External Key Quantity | 2 |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 4007021 | Rtx Corporation Div Pratt & Whitney (USA) |
| 4007021 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 4007021 | 5/9 Secondary reference M-F Services Inc |
| 5310PL0723122 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 4007021 | 5/9 Secondary reference Whitcraft Llc Dba Pursuit Aerospace |
NSN 5310-00-367-8770 is a Washer,key, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-367-8770 has 2 manufacturer part numbers on file: 4007021 (Rtx Corporation Div Pratt & Whitney), 4007021 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 4007021: Overall Distance Including Keys: 1.710 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN; Hardness Rating: 36.0 ROCKWELL C MINIMUM; Material Document and Classification: AMS5596 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.360 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN. 8 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.