The Nut,self-Locking,spline, cataloged under National Stock Number 5310-01-138-6325, 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 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-138-6325 |
| Primary Part Number | 79D36-080 |
| Item Name | Nut,self-Locking,spline |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Thread Series | UNF |
| Material Document and Classification | QQ-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | NICKEL ALLOY R-405 OR NICKEL ALLOY 400 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 |
|---|---|
| 79D36-080 | Esna, Llc (USA) |
| 22FY15-820 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 125-2143985 PIECE 6 | 3/9 Design control — primary reference Naval Ship Engineering Center Philadelphia Division Submarine Antenna Quality Assurance |
| 22FY15-820 | 5/9 Secondary reference U.S. Government activity |
| 79D36-080 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-138-6325 is a Nut,self-Locking,spline, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-138-6325 has 2 manufacturer part numbers on file: 79D36-080 (Esna, Llc), 22FY15-820 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 79D36-080: Thread Series: UNF; Material Document and Classification: QQ-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.500 INCHES IN. 7 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.