The Nut,plain,cap, cataloged under National Stock Number 5310-01-631-9474, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Morton Machine Works Inc Dba Morton. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-631-9474 |
| Primary Part Number | AN-2 |
| Item Name | Nut,plain,cap |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Morton Machine Works Inc Dba Morton |
| Status | ACTIVE |
| Width Across Flats | 0.875 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Nut Height | 0.938 INCHES NOMINAL IN |
| Surface Treatment | BLACK OXIDE OVERALL |
| Nut Style | CAP |
| Thread Class | 2B |
| Thread Quantity Per Inch | 13 |
| Material | STEEL OVERALL |
| Bearing Surface Type | CHAMFERED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-01-631-9474 is a Nut,plain,cap, manufactured by Morton Machine Works Inc Dba Morton, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-631-9474 has 2 manufacturer part numbers on file: AN-2 (Morton Machine Works Inc Dba Morton), 90790A216 (Mcmaster-Carr Supply Co).
Key specifications for AN-2: Width Across Flats: 0.875 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.500 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.