The Nut,plain,knurled, cataloged under National Stock Number 5310-01-183-4981, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-183-4981 |
| Item Name | Nut,plain,knurled |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Material Document and Classification | MIL-S-5226B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.625 INCHES IN |
| Nut Diameter | 2.440 INCHES NOMINAL IN |
| Counterbore Diameter | 0.640 INCHES MINIMUM AND 0.670 INCHES MAXIMUM FIRST END IN |
| Nut Thickness | 1.250 INCHES NOMINAL IN |
| Small End Diameter | 1.500 INCHES NOMINAL IN |
| Countersink Angle | 90.0 DEGREES MINIMUM AND 120.0 DEGREES MAXIMUM FIRST END |
| Nut Style | KNURLED |
| Thread Class | 2B |
| Thread Quantity Per Inch | 11 |
| Material | STEEL COMP 4130 OVERALL |
| Knurl Width | 0.630 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 |
| Reference | Meaning |
|---|---|
| 232-37138-4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-183-4981 is a Nut,plain,knurled, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-183-4981: Thread Series: UNIFIED NATIONAL COARSE (UNC); Material Document and Classification: MIL-S-5226B MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.625 INCHES IN. 14 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.