The Nut,self-Locking,round, cataloged under National Stock Number 5310-01-080-3440, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Whittet-Higgins Company. Government technical data includes 18 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 | 5310-01-080-3440 |
| Primary Part Number | BHSS00 |
| Item Name | Nut,self-Locking,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Whittet-Higgins Company |
| Status | ACTIVE |
| Thread Series | UNS |
| Temp Rating | 350.0 FAHRENHEIT MAXIMUM DEGF |
| Thread Pitch Diameters | +0.3707 TO 0.3733 INCHES IN |
| Drive Point Width | 0.105 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.391 INCHES IN |
| Nut Diameter | 0.735 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Drive Point Depth | 0.088 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN |
| Undercut Thickness | 0.094 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Thickness | 0.250 INCHES MINIMUM AND 0.282 INCHES MAXIMUM IN |
| Small End Diameter | 0.625 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL EXCEPT INSERT |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 303 NUT |
| Material | PLASTIC POLYHEXAMETHYLENE ADIPAMIDE LOCKING INSERT |
| 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 |
|---|---|
| BHSS00 PRIMARY | Whittet-Higgins Company (USA) |
NSN 5310-01-080-3440 is a Nut,self-Locking,round, manufactured by Whittet-Higgins Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-080-3440 has 1 manufacturer part number on file: BHSS00 (Whittet-Higgins Company).
Key specifications for BHSS00: Thread Series: UNS; Temp Rating: 350.0 FAHRENHEIT MAXIMUM DEGF; Thread Pitch Diameters: +0.3707 TO 0.3733 INCHES IN; Drive Point Width: 0.105 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN. 18 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.