The Nut,plain,assembled Washer, cataloged under National Stock Number 5310-00-253-7989, 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11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-253-7989 |
| Item Name | Nut,plain,assembled Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Washer Outside Diameter | 0.281 INCHES NOMINAL IN |
| Width Across Flats | 0.250 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.138 INCHES IN |
| Nut Height | 0.094 INCHES NOMINAL IN |
| Nut Style | EXTERNAL TOOTH |
| Thread Class | 2B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 1020 NUT |
| Material | STEEL COMP 1020 WASHER |
| 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 |
|---|---|
| 112472 | 5/9 Secondary reference Systron-Donner Corp Microwave/instrument Div |
| 511-061800-01 | 3/9 Design control — primary reference Itw Shakeproof Automotive Products |
NSN 5310-00-253-7989 is a Nut,plain,assembled Washer, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 2590-01-406-0347. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-253-7989: Overall Height: 0.109 INCHES NOMINAL IN; Washer Outside Diameter: 0.281 INCHES NOMINAL IN; Width Across Flats: 0.250 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL COARSE (UNC). 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.