The Washer,key, cataloged under National Stock Number 5310-00-376-6728, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-376-6728 |
| Item Name | Washer,key |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| External Straight Key Length | 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | KEY |
| Material Document and Classification | AMS 5044 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.432 INCHES MINIMUM AND 0.442 INCHES MAXIMUM IN |
| Peening Key Length | 0.125 INCHES NOMINAL IN |
| Material Thickness | 0.035 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN |
| External Straight Key Width | 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN |
| External Key Quantity | 4 |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 1010 OVERALL |
| Hole Diameter | 0.198 INCHES MINIMUM AND 0.208 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 |
| Reference | Meaning |
|---|---|
| 1421-526324 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| 1421-526324 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-376-6728 is a Washer,key, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-376-6728: External Straight Key Length: 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: KEY; Material Document and Classification: AMS 5044 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.