The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-822-2974, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Allmetal Screw Products Corp. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-822-2974 |
| Primary Part Number | 4-40HEXNUTUNC18-8SS |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Allmetal Screw Products Corp |
| Status | ACTIVE |
| Width Across Flats | 0.188 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.112 INCHES IN |
| Nut Height | 0.087 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 40 |
| Material | STEEL CORROSION RESISTING 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 |
| Part Number | Manufacturer |
|---|---|
| 4-40HEXNUTUNC18-8SS | Allmetal Screw Products Corp (USA) |
| Reference | Meaning |
|---|---|
| MHNMD4CS | 5/2 Secondary reference U.S. Government activity |
| 4-40NC2B | 3/1 Design control — primary reference Allmetal Screw Products Corp |
NSN 5310-00-822-2974 is a Nut,plain,hexagon, manufactured by Allmetal Screw Products Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-822-2974 has 1 manufacturer part number on file: 4-40HEXNUTUNC18-8SS (Allmetal Screw Products Corp).
Key specifications for 4-40HEXNUTUNC18-8SS: Width Across Flats: 0.188 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.112 INCHES IN. 11 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.