The Nut,self-Locking,square, cataloged under National Stock Number 5310-01-198-3489, 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13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-198-3489 |
| Item Name | Nut,self-Locking,square |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Width Across Flats | 0.520 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Hardness Rating | 42.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Locking Feature | FREE-RUNNING ALL METAL DESIGN |
| Nut Height | 0.400 INCHES NOMINAL IN |
| Nut Style | SQUARE |
| Thread Class | 2B |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 1108 OVERALL |
| Bearing Surface Type | FLAT |
| 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 |
|---|---|
| C7951-1024 | 3/9 Design control — primary reference Tinnerman Palnut Engineered Products, Inc. |
NSN 5310-01-198-3489 is a Nut,self-Locking,square, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-198-3489: Width Across Flats: 0.520 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Hardness Rating: 42.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM; Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.