The Nut,self-Locking,spline, cataloged under National Stock Number 5310-00-720-6592, 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 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-720-6592 |
| Primary Part Number | 79NCFM1-40 |
| Item Name | Nut,self-Locking,spline |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Temp Rating | 250.0 FAHRENHEIT NOMINAL DEGF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.112 INCHES IN |
| Nut Diameter | 0.203 INCHES NOMINAL IN |
| Pilot Diameter | 0.160 INCHES NOMINAL IN |
| Pilot Length | 0.040 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 0.130 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE NUT |
| Nut Style | SPLINE |
| Thread Class | 2B |
| Thread Quantity Per Inch | 40 |
| Material | STEEL CORROSION RESISTING NUT |
| Material | PLASTIC POLYAMIDE NYLON 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 |
|---|---|
| 540344-101 | Bae Systems Information and Electronic Systems Integration Inc. Div Bae Systems Information & Electronic Systems Integration Inc (USA) |
| 540344-101 | Stromberg-Carlson Corp a Plessey Telecommunications Co (USA) |
| 666137-237 | Bae Systems Information and Electronic Systems Integration Inc. Div Bae Systems Information & Electronic Systems Integration Inc (USA) |
| 79NCFM1-40 PRIMARY | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| 8317-3500-2 | 5/2 Secondary reference U.S. Government activity |
| 79NCFM1-40 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-00-720-6592 is a Nut,self-Locking,spline, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-720-6592 has 4 manufacturer part numbers on file: 540344-101 (Bae Systems Information and Electronic Systems Integration Inc. Div Bae Systems Information & Electronic Systems Integration Inc), 540344-101 (Stromberg-Carlson Corp a Plessey Telecommunications Co), 666137-237 (Bae Systems Information and Electronic Systems Integration Inc. Div Bae Systems Information & Electronic Systems Integration Inc), 79NCFM1-40 (Esna, Llc).
Key specifications for 79NCFM1-40: Thread Series: UNIFIED NATIONAL COARSE (UNC); Temp Rating: 250.0 FAHRENHEIT NOMINAL DEGF; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.112 INCHES IN. 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.