The Nut,plain,knurled, cataloged under National Stock Number 5310-01-581-4126, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-581-4126 |
| Primary Part Number | 91833A125 |
| Item Name | Nut,plain,knurled |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Width Across Flats | 0.375 INCHES NOMINAL IN |
| Thread Tolerance Class | H2 INTERNAL |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Hardness Rating | 60.0 ROCKWELL B NOMINAL |
| Material Document and Classification | ASTM A581,ASTM A582 NATIONAL SPEC ALL MATERIAL RESPONSES OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Nut Diameter | 0.500 INCHES NOMINAL IN |
| Nut Thickness | 0.438 INCHES NOMINAL IN |
| Small End Diameter | 0.375 INCHES NOMINAL IN |
| Nut Style | KNURLED |
| Thread Class | 2B |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 303SE OVERALL |
| Knurl Width | 0.188 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 91833A125 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 5310-01-581-4126 is a Nut,plain,knurled, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-581-4126 has 1 manufacturer part number on file: 91833A125 (Mcmaster-Carr Supply Co).
Key specifications for 91833A125: Width Across Flats: 0.375 INCHES NOMINAL IN; Thread Tolerance Class: H2 INTERNAL; Thread Series: UNIFIED NATIONAL COARSE (UNC); Hardness Rating: 60.0 ROCKWELL B NOMINAL. 15 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.