The Nut,self-Locking,castellated,hex, cataloged under National Stock Number 5310-01-171-1824, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-171-1824 |
| Item Name | Nut,self-Locking,castellated,hex |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Width Across Flats | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Criticality Code Justification | ZZZY |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.582 INCHES MINIMUM AND 0.602 INCHES MAXIMUM IN |
| Nut Style | CASTELLATED, HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 13 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Bearing Surface Type | FLAT |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | C |
| Reference | Meaning |
|---|---|
| 147D5810PC11 | 3/1 Design control — primary reference Fluor Marine Propulsion, Llc Dba Knolls Atomic Power Laboratory |
| 50FAF-813 | 5/1 Secondary reference Fluor Marine Propulsion, Llc Dba Knolls Atomic Power Laboratory |
NSN 5310-01-171-1824 is a Nut,self-Locking,castellated,hex, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5310-01-406-1254. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-01-171-1824: Width Across Flats: 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Criticality Code Justification: ZZZY; Thread Direction: RIGHT-HAND. 13 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.