The Nut,plain,square, cataloged under National Stock Number 5310-01-137-6802, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-137-6802 |
| Item Name | Nut,plain,square |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Width Across Flats | 0.547 INCHES MINIMUM AND 0.547 INCHES MINIMUM AND 0.562 INCHES MAXIMUM0.562 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC) |
| Material Document and Classification | ASTM A240 ASSN STD ALL MATERIAL RESPONSES OVERALLASTM A240 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Thread Direction | RIGHT-HANDRIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES0.312 INCHES IN |
| Nut Height | 0.249 INCHES MINIMUM AND 0.249 INCHES MINIMUM AND 0.283 INCHES MAXIMUM0.283 INCHES MAXIMUM IN |
| Surface Treatment | ZINC OVERALLZINC OVERALL |
| Nut Style | SQUARESQUARE |
| Thread Class | 2B2B |
| Thread Quantity Per Inch | 1818 |
| Material | STEEL COMP 302 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 310S OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 405 OR STEEL COMP 410 OR STEEL COMP 429 OR STEEL COMP 430 OR STEEL COMP 304 OVERALL |
| Bearing Surface Type | FLATFLAT |
| 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 |
|---|---|
| 7953 | 3/9 Design control — primary reference Warn Industries, Inc. Dba Warn Div Warn Industries |
NSN 5310-01-137-6802 is a Nut,plain,square, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 7490-01-295-5529. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-01-137-6802: Width Across Flats: 0.547 INCHES MINIMUM AND 0.547 INCHES MINIMUM AND 0.562 INCHES MAXIMUM0.562 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC); Material Document and Classification: ASTM A240 ASSN STD ALL MATERIAL RESPONSES OVERALLASTM A240 ASSN STD ALL MATERIAL RESPONSES OVERALL; Thread Direction: RIGHT-HANDRIGHT-HAND. 12 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.