The Nut,self-Locking,round, cataloged under National Stock Number 5310-01-187-7971, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-187-7971 |
| Item Name | Nut,self-Locking,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-13924,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNJS |
| Temp Rating | 350.0 FAHRENHEIT NOMINAL DEGF |
| Thread Pitch Diameters | +1.1370 TO 1.1419 INCHES IN |
| Material Document and Classification | AMS 6370,COND F ASSN STD SINGLE MATERIAL RESPONSE OR AMS 6371 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Drive Point Width | 0.173 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.173 INCHES IN |
| Nut Diameter | 1.703 INCHES MINIMUM AND 1.723 INCHES MAXIMUM IN |
| Drive Point Depth | 0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN |
| Undercut Thickness | 0.104 INCHES MINIMUM AND 0.134 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE WITH METALLIC INSERT |
| Nut Thickness | 0.416 INCHES MINIMUM AND 0.446 INCHES MAXIMUM IN |
| Small End Diameter | 1.449 INCHES MINIMUM AND 1.479 INCHES MAXIMUM IN |
| Surface Treatment | OXIDE OVERALL |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Class | 3B |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 4130 OVERALL |
| 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 |
|---|---|
| 5903477 | 1/2 Source control — Government-approved source U.S. Government activity |
| SL 7155 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-187-7971 is a Nut,self-Locking,round, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-187-7971: Surface Treatment Document and Classification: MIL-C-13924,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNJS; Temp Rating: 350.0 FAHRENHEIT NOMINAL DEGF; Thread Pitch Diameters: +1.1370 TO 1.1419 INCHES IN. 20 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.