The Nut,self-Locking,clinch, cataloged under National Stock Number 5310-00-685-6790, 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 13 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5310-00-685-6790 |
| Primary Part Number | 68NC4-40 |
| Item Name | Nut,self-Locking,clinch |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | CANCELLED |
| Width Across Flats | 0.250 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.112 INCHES IN |
| Pilot Diameter | 0.189 INCHES NOMINAL IN |
| Pilot Length | 0.135 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 0.276 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL |
| Nut Style | CLINCH |
| Thread Class | 3B |
| Thread Quantity Per Inch | 40 |
| Material | ALUMINUM ALLOY OVERALL |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 68NC4-40 PRIMARY | Esna, Llc (USA) |
| 7764294P4 | Lockheed Martin Corporation Div Rms (USA) |
| 203-1024P24 | Raytheon Company Dba Raytheon Co (USA) |
| Reference | Meaning |
|---|---|
| 203-1024P24 | 5/9 Secondary reference Raytheon Company Div Corp |
| 7764294P4 | 5/9 Secondary reference General Electric Company |
| 68NC4-40 | 5/9 Secondary reference Harvard Industries Inc |
| 68NC4-4D | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-00-685-6790 is a Nut,self-Locking,clinch, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: cancelled.
NSN 5310-00-685-6790 has 3 manufacturer part numbers on file: 68NC4-40 (Esna, Llc), 7764294P4 (Lockheed Martin Corporation Div Rms), 203-1024P24 (Raytheon Company Dba Raytheon Co).
Key specifications for 68NC4-40: Width Across Flats: 0.250 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.112 INCHES IN. 13 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.
NSN 5310-00-685-6790 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.