The Nut,plain,round, cataloged under National Stock Number 5310-00-032-1731, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Mitchel Field. Government technical data includes 14 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 | 5310-00-032-1731 |
| Primary Part Number | 120939 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| Thread Series | UNEF |
| Material Document and Classification | QQ-S-763,TYPE A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Drive Point Width | 0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Diameter | 0.464 INCHES MINIMUM AND 0.474 INCHES MAXIMUM IN |
| Drive Point Depth | 0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN |
| Nut Thickness | 0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Class | 2B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 303 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 |
|---|---|
| 120939 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
NSN 5310-00-032-1731 is a Nut,plain,round, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-032-1731 has 1 manufacturer part number on file: 120939 (Lockheed Martin Corporation Div Rms - Mitchel Field).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-330-7524. Verify interchangeability with system specifications before substitution.
Key specifications for 120939: Thread Series: UNEF; Material Document and Classification: QQ-S-763,TYPE A FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Drive Point Width: 0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN; Thread Direction: RIGHT-HAND. 14 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.