The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-877-6958, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-877-6958 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Width Across Flats | 2.481 INCHES MINIMUM AND 2.562 INCHES MAXIMUM IN |
| Thread Series | UN |
| Hardness Rating | 24.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.625 INCHES IN |
| Nondefinitive Spec/std Data | 2 TYPE AND 4 SYMBOL |
| Nut Height | 1.556 INCHES MINIMUM AND 1.632 INCHES MAXIMUM IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Material | STEEL 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 |
| Reference | Meaning |
|---|---|
| MILS001222TYPE2SYMB0L4 | 4/1 Identification reference U.S. Government activity |
| MIL-STD-1222J TYPE3 GR4 | 2/2 Government specification standardization U.S. Government activity |
NSN 5310-00-877-6958 is a Nut,plain,hexagon, classified under FSC 5310, Nuts and Washers. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 5310-00-877-7390, 5310-00-877-7392, 5310-00-877-7393. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-877-6958: Width Across Flats: 2.481 INCHES MINIMUM AND 2.562 INCHES MAXIMUM IN; Thread Series: UN; Hardness Rating: 24.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM; Thread Direction: RIGHT-HAND. 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.