The Nut,plain,extended Washer,hexago, cataloged under National Stock Number 5310-01-490-6056, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-490-6056 |
| Primary Part Number | 91030A036 |
| Item Name | Nut,plain,extended Washer,hexago |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Washer Outside Diameter | 1.625 INCHES NOMINAL IN |
| Width Across Flats | 1.250 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Washer Thickness | 0.250 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | OXIDE OVERALL |
| Nut Style | HEXAGON |
| Thread Quantity Per Inch | 10 |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 91030A036 | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 6510E68FN31 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-490-6056 is a Nut,plain,extended Washer,hexago, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-490-6056 has 1 manufacturer part number on file: 91030A036 (Mcmaster-Carr Supply Co).
Key specifications for 91030A036: Overall Height: 1.000 INCHES NOMINAL IN; Washer Outside Diameter: 1.625 INCHES NOMINAL IN; Width Across Flats: 1.250 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL COARSE (UNC). 9 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.