The Washer,key, cataloged under National Stock Number 5310-00-765-1978, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate. Government technical data includes 12 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 | 5310-00-765-1978 |
| Primary Part Number | 7651978 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES INNER |
| Distance From Centerline to Inside of Prebent Key | 0.308 INCHES NOMINAL IN |
| External Prebent Key Length | 0.078 INCHES MINIMUM AND 0.083 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 0.5685 INCHES MINIMUM AND 0.5785 INCHES MAXIMUM IN |
| Style Designator | KEY |
| Material Document and Classification | QQ-S-698 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-700 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.463 INCHES MINIMUM AND 0.473 INCHES MAXIMUM IN |
| Material Thickness | 0.035 INCHES NOMINAL IN |
| Surface Treatment | PHOSPHATE OVERALL |
| External Prebent Key Width | 0.148 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN |
| Material | STEEL COMP 1022 OVERALL |
| Hole Diameter | 0.376 INCHES MINIMUM AND 0.378 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 |
|---|---|
| 7651978 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
NSN 5310-00-765-1978 is a Washer,key, manufactured by Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-765-1978 has 1 manufacturer part number on file: 7651978 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
Key specifications for 7651978: Surface Finish: 63.0 MICROINCHES INNER; Distance From Centerline to Inside of Prebent Key: 0.308 INCHES NOMINAL IN; External Prebent Key Length: 0.078 INCHES MINIMUM AND 0.083 INCHES MAXIMUM IN; Overall Distance Including Keys: 0.5685 INCHES MINIMUM AND 0.5785 INCHES MAXIMUM IN. 12 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.