The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-250-0643, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Air Warfare Center Weapons Div. Government technical data includes 16 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-250-0643 |
| Primary Part Number | NWC78A342 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Air Warfare Center Weapons Div |
| Status | ACTIVE |
| Width Across Flats | 0.613 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35,TY 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNS |
| Hole Configuration Style | CONFIGURATION B |
| Material Document and Classification | AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES IN |
| Nut Height | 0.187 INCHES NOMINAL IN |
| Drilled Hole Diameter | 0.088 INCHES MINIMUM AND 0.093 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 64 |
| Material | STEEL COMP 630 OVERALL |
| Bearing Surface Type | CHAMFERED |
| Hole Type and Quantity | 4 DRILLED |
| 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 |
|---|---|
| NWC78A342 PRIMARY | Naval Air Warfare Center Weapons Div (USA) |
NSN 5310-01-250-0643 is a Nut,plain,hexagon, manufactured by Naval Air Warfare Center Weapons Div, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-250-0643 has 1 manufacturer part number on file: NWC78A342 (Naval Air Warfare Center Weapons Div).
Key specifications for NWC78A342: Width Across Flats: 0.613 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35,TY 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNS; Hole Configuration Style: CONFIGURATION B. 16 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.