The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-121-5404, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-121-5404 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Width Across Flats | 0.250 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Material Document and Classification | QQ-B-626 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.112 INCHES IN |
| Nut Height | 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN |
| Surface Treatment | ZINC OVERALL |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 40 |
| Material | COPPER ALLOY 260 OR COPPER ALLOY 262 OR COPPER ALLOY 268 OR COPPER ALLOY 270 OR COPPER ALLOY 272 OR COPPER ALLOY 274 OR COPPER ALLOY 280 OR COPPER ALLOY 331 OR COPPER ALLOY 332 OR COPPER ALLOY 335 OR COPPER ALLOY 340 OR COPPER ALLOY 342 OR COPPER ALLOY 344 OR COPPER ALLOY 345 OR COPPER ALLOY 347 OR COPPER ALLOY 348 OR COPPER ALLOY 350 OR COPPER ALLOY 353 OR COPPER ALLOY 356 OR COPPER ALLOY 360 OR COPPER ALLOY 370 OR COPPER ALLOY 462 OR COPPER ALLOY 464 OR COPPER ALLOY 465 OR COPPER ALLOY 466 OR COPPER ALLOY 467 OR COPPER ALLOY 482 OR COPPER ALLOY 485 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 |
| Reference | Meaning |
|---|---|
| 8826 | 3/2 Design control — primary reference U.S. Government activity |
| 8826 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-121-5404 is a Nut,plain,hexagon, classified under FSC 5310, Nuts and Washers. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 5985-01-147-5205, 6130-01-310-7949, 6625-01-435-4434. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-01-121-5404: Width Across Flats: 0.250 INCHES NOMINAL IN; Surface Treatment Document and Classification: ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL COARSE (UNC); Material Document and Classification: QQ-B-626 FED SPEC ALL MATERIAL RESPONSES OVERALL. 13 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.