The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-365-6328, 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 10 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. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-365-6328 |
| Primary Part Number | 1/4-20UNC-2B |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Allmetal Screw Products Corp |
| Status | ACTIVE |
| Width Across Flats | 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Height | 0.212 INCHES MINIMUM AND 0.226 INCHES MAXIMUM IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| Material | NICKEL ALLOY 400 OR NICKEL ALLOY K-500 OVERALL |
| Bearing Surface Type | WASHER FACED |
| 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 |
|---|---|
| 1/4-20UNC-2B PRIMARY | Allmetal Screw Products Corp (USA) |
NSN 5310-01-365-6328 is a Nut,plain,hexagon, manufactured by Allmetal Screw Products Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-365-6328 has 1 manufacturer part number on file: 1/4-20UNC-2B (Allmetal Screw Products Corp).
3 possible matches (shared part number, not a government interchangeability claim): 5310-01-429-2403, 5310-01-433-2754, 5310-01-542-4889. Verify interchangeability with system specifications before substitution.
Key specifications for 1/4-20UNC-2B: Width Across Flats: 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.250 INCHES IN. 10 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.