The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-488-8919, 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 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-488-8919 |
| Primary Part Number | 68M26 |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Width Across Flats | 0.240 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Material Document and Classification | AMS 4118 ASSN STD ALL MATERIAL RESPONSES NUT |
| Material Document and Classification | MIL-M-20693 COMP A TYPE 1 MIL SPEC ALL MATERIAL RESPONSES LOCKING INSERT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.086 INCHES IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 0.143 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE NUT |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 56 |
| Material | FIBER LOCKING INSERT |
| Material | ALUMINUM ALLOY NUT |
| Bearing Surface Type | FLAT |
| 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 |
|---|---|
| 68M26 PRIMARY | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| 100A104-2 | 5/2 Secondary reference U.S. Government activity |
| 68M26 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-00-488-8919 is a Nut,self-Locking,hexagon, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-488-8919 has 1 manufacturer part number on file: 68M26 (Esna, Llc).
Key specifications for 68M26: Width Across Flats: 0.240 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Material Document and Classification: AMS 4118 ASSN STD ALL MATERIAL RESPONSES NUT; Material Document and Classification: MIL-M-20693 COMP A TYPE 1 MIL SPEC ALL MATERIAL RESPONSES LOCKING INSERT. 15 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.