The Nut,self-Locking,round, cataloged under National Stock Number 5310-01-281-9207, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-281-9207 |
| Primary Part Number | BH-18 |
| Item Name | Nut,self-Locking,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Whittet-Higgins Company |
| Status | ACTIVE |
| Thread Series | UNS |
| Thread Pitch Diameters | +3.4655 TO 3.4729 INCHES IN |
| Drive Point Width | 0.355 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 3.527 INCHES IN |
| Nut Diameter | 4.641 INCHES MINIMUM AND 4.656 INCHES MAXIMUM IN |
| Drive Point Depth | 0.151 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN |
| Undercut Thickness | 0.203 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Thickness | 0.765 INCHES MINIMUM AND 0.797 INCHES MAXIMUM IN |
| Small End Diameter | 3.968 INCHES NOMINAL IN |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Quantity Per Inch | 12 |
| Material | STEEL NUT |
| Material | FIBER 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 |
|---|---|
| BH-18 PRIMARY | Whittet-Higgins Company (USA) |
| Reference | Meaning |
|---|---|
| K59-0050 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5310-01-281-9207 is a Nut,self-Locking,round, manufactured by Whittet-Higgins Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-281-9207 has 1 manufacturer part number on file: BH-18 (Whittet-Higgins Company).
Key specifications for BH-18: Thread Series: UNS; Thread Pitch Diameters: +3.4655 TO 3.4729 INCHES IN; Drive Point Width: 0.355 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN; Thread Direction: RIGHT-HAND. 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.