The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-152-8269, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Barnes Group Inc. Dba Barnes Distribution. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-152-8269 |
| Primary Part Number | 31255 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Barnes Group Inc. Dba Barnes Distribution |
| Status | ACTIVE |
| Width Across Flats | 0.365 INCHES NOMINAL IN |
| Thread Series | UNF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Nut Height | 0.126 INCHES NOMINAL IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 32 |
| Bearing Surface Type | CHAMFERED |
| 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 |
|---|---|
| 31255 PRIMARY | Barnes Group Inc. Dba Barnes Distribution (USA) |
| Reference | Meaning |
|---|---|
| 729 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-152-8269 is a Nut,plain,hexagon, manufactured by Barnes Group Inc. Dba Barnes Distribution, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-152-8269 has 1 manufacturer part number on file: 31255 (Barnes Group Inc. Dba Barnes Distribution).
4 possible matches (shared part number, not a government interchangeability claim): 5365-01-191-3529, 9540-01-300-2883, 5905-01-375-9053. Verify interchangeability with system specifications before substitution.
Key specifications for 31255: Width Across Flats: 0.365 INCHES NOMINAL IN; Thread Series: UNF; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.190 INCHES IN. 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.