The Nut,self-Locking,round, cataloged under National Stock Number 5310-01-282-7520, 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 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-282-7520 |
| Primary Part Number | BH-19 |
| Item Name | Nut,self-Locking,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Whittet-Higgins Company |
| Status | ACTIVE |
| Thread Pitch Diameters | +3.6759 TO 3.6833 INCHES IN |
| Nut Counterbore Depth | 0.2031 INCHES NOMINAL BOSS IN |
| Drive Point Width | 0.355 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Nominal Thread Size | 3.740 INCHES IN |
| Nut Diameter | 4.9360 INCHES MINIMUM AND 4.9375 INCHES MAXIMUM IN |
| Counterbore Diameter | 3.6398 INCHES MINIMUM AND 3.6488 INCHES MAXIMUM BOSS IN |
| Drive Point Depth | 0.3025 INCHES MINIMUM AND 0.3310 INCHES MAXIMUM IN |
| Undercut Thickness | 0.2031 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Thickness | 0.7969 INCHES MINIMUM AND 0.8281 INCHES MAXIMUM IN |
| Small End Diameter | 4.1719 INCHES NOMINAL IN |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Quantity Per Inch | 12 |
| 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 |
|---|---|
| BH-19 PRIMARY | Whittet-Higgins Company (USA) |
NSN 5310-01-282-7520 is a Nut,self-Locking,round, manufactured by Whittet-Higgins Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-282-7520 has 1 manufacturer part number on file: BH-19 (Whittet-Higgins Company).
Key specifications for BH-19: Thread Pitch Diameters: +3.6759 TO 3.6833 INCHES IN; Nut Counterbore Depth: 0.2031 INCHES NOMINAL BOSS IN; Drive Point Width: 0.355 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN; Nominal Thread Size: 3.740 INCHES IN. 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.