The Washer,key, cataloged under National Stock Number 5310-01-072-8256, 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 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 | 5310-01-072-8256 |
| Primary Part Number | 10554739 |
| 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 |
| Distance From Centerline to Inside of Prebent Key | 0.016 INCHES NOMINAL IN |
| External Prebent Key Length | 0.025 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN |
| Overall Distance Including Keys | 0.400 INCHES NOMINAL IN |
| Style Designator | KEY |
| Material Document and Classification | QQ-B-613 1/2 H FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 1/2 H FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Material Thickness | 0.024 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN |
| External Prebent Key Width | 0.110 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN |
| Material | COPPER ALLOY 268 OVERALL |
| Hole Diameter | 0.247 INCHES MINIMUM AND 0.250 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 |
|---|---|
| 10554739 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
NSN 5310-01-072-8256 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 5310-01-072-8256 has 1 manufacturer part number on file: 10554739 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
Key specifications for 10554739: Distance From Centerline to Inside of Prebent Key: 0.016 INCHES NOMINAL IN; External Prebent Key Length: 0.025 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN; Overall Distance Including Keys: 0.400 INCHES NOMINAL IN; Style Designator: KEY. 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.