The Nut,plain,round, cataloged under National Stock Number 5310-01-491-9072, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-491-9072 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-13924,CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Flange Thickness | 0.134 INCHES NOMINAL IN |
| Thread Series | UNEF |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | MIL-S-6758, COND F4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Drive Point Width | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.375 INCHES IN |
| Nut Diameter | 1.896 INCHES MINIMUM AND 1.916 INCHES MAXIMUM IN |
| Drive Point Depth | 0.093 INCHES NOMINAL IN |
| Undercut Thickness | 0.062 INCHES NOMINAL IN |
| Nut Thickness | 0.271 INCHES MINIMUM AND 0.291 INCHES MAXIMUM IN |
| Surface Treatment | OXIDE OVERALL |
| Drive Point Quantity | 8 |
| 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 |
|---|---|
| SL61N8FSP4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-491-9072 is a Nut,plain,round, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-491-9072: Surface Treatment Document and Classification: MIL-C-13924,CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Flange Thickness: 0.134 INCHES NOMINAL IN; Thread Series: UNEF; Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM. 18 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.