The Nut,self-Locking,double Hexagon, cataloged under National Stock Number 5310-00-596-5981, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Esna, Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-596-5981 |
| Primary Part Number | 1747-064 |
| Item Name | Nut,self-Locking,double Hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Width Across Flats | 0.488 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN |
| Thread Series | UNF |
| Precious Material | SILVER |
| Temp Rating | 1200.0 FAHRENHEIT NOMINAL DEGF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.500 INCHES NOMINAL IN |
| Surface Treatment | SILVER OVERALL |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Bearing Surface Type | CHAMFERED |
| 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 |
|---|---|
| 1747-064 PRIMARY | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| 1747-064 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-00-596-5981 is a Nut,self-Locking,double Hexagon, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-596-5981 has 1 manufacturer part number on file: 1747-064 (Esna, Llc).
Key specifications for 1747-064: Width Across Flats: 0.488 INCHES MINIMUM AND 0.504 INCHES MAXIMUM IN; Thread Series: UNF; Precious Material: SILVER; Temp Rating: 1200.0 FAHRENHEIT NOMINAL DEGF. 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.