The Nut,plain,castellated,hexagon, cataloged under National Stock Number 5310-00-720-6151, 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12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-720-6151 |
| Item Name | Nut,plain,castellated,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Width Across Flats | 0.720 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN |
| Thread Series | UNF |
| Material Document and Classification | MIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | LEFT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Nut Height | 0.420 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | CASTELLATED, HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 4140 OVERALL |
| Bearing Surface Type | CHAMFERED OR WASHER FACED |
| 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 |
|---|---|
| 23533 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-720-6151 is a Nut,plain,castellated,hexagon, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-720-6151: Width Across Flats: 0.720 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN; Thread Series: UNF; Material Document and Classification: MIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: LEFT-HAND. 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.