The Nut,plain,round, cataloged under National Stock Number 5310-01-490-5891, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Crosby Group Inc the Mckissick Plant Div. Government technical data includes 6 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 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 | 5310-01-490-5891 |
| Primary Part Number | 2001274 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Crosby Group Inc the Mckissick Plant Div |
| Status | ACTIVE |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Nominal Thread Size | 2.500 INCHES IN |
| Nut Diameter | 6.250 INCHES NOMINAL IN |
| Nut Thickness | 0.750 INCHES NOMINAL IN |
| Nut Style | ROUND |
| Thread Quantity Per Inch | 8 |
| 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 |
|---|---|
| 2001274 PRIMARY | Crosby Group Inc the Mckissick Plant Div (USA) |
NSN 5310-01-490-5891 is a Nut,plain,round, manufactured by Crosby Group Inc the Mckissick Plant Div, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-490-5891 has 1 manufacturer part number on file: 2001274 (Crosby Group Inc the Mckissick Plant Div).
1 possible match (shared part number, not a government interchangeability claim): 6150-01-533-2538. Verify interchangeability with system specifications before substitution.
Key specifications for 2001274: Thread Series: UNIFIED NATIONAL COARSE (UNC); Nominal Thread Size: 2.500 INCHES IN; Nut Diameter: 6.250 INCHES NOMINAL IN; Nut Thickness: 0.750 INCHES NOMINAL IN. 6 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.