The Nut,plain,knurled, cataloged under National Stock Number 5310-01-621-3293, 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 | 5310-01-621-3293 |
| Primary Part Number | 91833A121 |
| Item Name | Nut,plain,knurled |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Thread Tolerance Class | H2 INTERNAL |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Hardness Rating | 60.0 ROCKWELL B NOMINAL |
| Material Document and Classification | ASTM A581/A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.164 INCHES IN |
| Nut Diameter | 0.500 INCHES NOMINAL IN |
| Nut Thickness | 0.375 INCHES NOMINAL IN |
| Small End Length | 0.250 INCHES NOMINAL IN |
| Small End Diameter | 0.3125 INCHES NOMINAL IN |
| Nut Style | KNURLED |
| Thread Class | 2B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Knurl Width | 0.125 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 |
|---|---|
| 91833A121 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 5310-01-621-3293 is a Nut,plain,knurled, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-621-3293 has 1 manufacturer part number on file: 91833A121 (Mcmaster-Carr Supply Co).
Key specifications for 91833A121: Thread Tolerance Class: H2 INTERNAL; Thread Series: UNIFIED NATIONAL COARSE (UNC); Hardness Rating: 60.0 ROCKWELL B NOMINAL; Material Document and Classification: ASTM A581/A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.