The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-425-1836, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Unison Industries Llc. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-425-1836 |
| Primary Part Number | 28971 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Unison Industries Llc |
| Status | ACTIVE |
| Width Across Flats | 0.750 INCHES NOMINAL IN |
| Thread Series | UNEF |
| Hole Configuration Style | CONFIGURATION B |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Nut Height | 0.135 INCHES MINIMUM AND 0.155 INCHES MAXIMUM IN |
| Drilled Hole Diameter | 0.045 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 1212 OR STEEL COMP 1213 OVERALL |
| Bearing Surface Type | FLAT |
| Hole Type and Quantity | 2 DRILLED |
| 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 |
|---|---|
| 28971 PRIMARY | Unison Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| 28971 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-425-1836 is a Nut,plain,hexagon, manufactured by Unison Industries Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-425-1836 has 1 manufacturer part number on file: 28971 (Unison Industries Llc).
3 possible matches (shared part number, not a government interchangeability claim): 5210-00-529-0883, 5975-01-019-2589, 5950-01-330-8657. Verify interchangeability with system specifications before substitution.
Key specifications for 28971: Width Across Flats: 0.750 INCHES NOMINAL IN; Thread Series: UNEF; Hole Configuration Style: CONFIGURATION B; Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.