The Nut,plain,assembled Washer, cataloged under National Stock Number 5310-01-036-6788, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-036-6788 |
| Item Name | Nut,plain,assembled Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Washer Outside Diameter | 0.530 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| Width Across Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Bearing Surface Finish | 125.0 MICROINCHES |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT MAXIMUM DEGF |
| Nut Counterbore Depth | 0.172 INCHES MINIMUM AND 0.192 INCHES MAXIMUM NUT IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Counterbore Diameter | 0.299 INCHES MINIMUM AND 0.309 INCHES MAXIMUM NUT IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | FLAT WITH TURNED BACK EDGE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | IRON ALLOY 660 NUT |
| 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 |
|---|---|
| MS21244-4C | 5/9 Secondary reference U.S. Government activity |
| MS21244-4C | 3/2 Design control — primary reference U.S. Government activity |
| E11900-4 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-036-6788 is a Nut,plain,assembled Washer, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-036-6788: Overall Height: 0.365 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN; Washer Outside Diameter: 0.530 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN; Width Across Flats: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN; Bearing Surface Finish: 125.0 MICROINCHES. 15 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.