The Washer,key, cataloged under National Stock Number 5310-00-321-4797, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Allison Transmission Inc Dba Allison Transmission, Inc. Government technical data includes 9 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 | 5310-00-321-4797 |
| Primary Part Number | 6866709 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| Distance From Centerline to Inside of Prebent Key | 0.370 INCHES NOMINAL IN |
| External Prebent Key Length | 0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Hardness Rating | 50.0 ROCKWELL C NOMINAL |
| Material Document and Classification | AMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN |
| Material Thickness | 0.028 INCHES MINIMUM AND 0.036 INCHES MAXIMUM IN |
| External Straight Key Width | 0.200 INCHES NOMINAL IN |
| Material | STEEL COMP 321 OVERALL |
| Hole Diameter | 0.255 INCHES MINIMUM AND 0.260 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 |
|---|---|
| 6866709 PRIMARY | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
NSN 5310-00-321-4797 is a Washer,key, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-321-4797 has 1 manufacturer part number on file: 6866709 (Allison Transmission Inc Dba Allison Transmission, Inc).
Key specifications for 6866709: Distance From Centerline to Inside of Prebent Key: 0.370 INCHES NOMINAL IN; External Prebent Key Length: 0.100 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN; Hardness Rating: 50.0 ROCKWELL C NOMINAL; Material Document and Classification: AMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.