The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-01-668-7666, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Heyco Inc Dba Heyco Products. Government technical data includes 6 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 | 5310-01-668-7666 |
| Primary Part Number | 2258 |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Heyco Inc Dba Heyco Products |
| Status | ACTIVE |
| Thread Series | M |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 15.2 MILLIMETERS MM |
| Surface Treatment | NICKEL OVERALL |
| Thread Quantity Per Inch | 18 |
| Material | COPPER AND ZINC 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 |
|---|---|
| 2258 PRIMARY | Heyco Inc Dba Heyco Products (USA) |
NSN 5310-01-668-7666 is a Nut,self-Locking,hexagon, manufactured by Heyco Inc Dba Heyco Products, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-668-7666 has 1 manufacturer part number on file: 2258 (Heyco Inc Dba Heyco Products).
Key specifications for 2258: Thread Series: M; Thread Direction: RIGHT-HAND; Nominal Thread Size: 15.2 MILLIMETERS MM; Special Features: WRENCHING FLATS ARE 18.0 MM; THICKNESS IS 2.8 MM MM. 6 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.