The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-01-226-8957, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 5 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-226-8957 |
| Primary Part Number | 73761-820 |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Width Across Flats | 0.846 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS5731 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | AMS5737 FED SPEC 1ST MATERIAL RESPONSE OR AMS5731 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| Nut Height | 0.328 INCHES NOMINAL IN |
| Surface Treatment | SILVER 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 |
|---|---|
| 73761-820 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST33D43C080 | Lockheed Martin Corp (USA) |
NSN 5310-01-226-8957 is a Nut,self-Locking,hexagon, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-226-8957 has 2 manufacturer part numbers on file: 73761-820 (Sps Technologies, Llc Dba PB Fasteners), ST33D43C080 (Lockheed Martin Corp).
Key specifications for 73761-820: Width Across Flats: 0.846 INCHES NOMINAL IN; Surface Treatment Document and Classification: AMS5731 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Material Document and Classification: AMS5737 FED SPEC 1ST MATERIAL RESPONSE OR AMS5731 FED SPEC 2ND MATERIAL RESPONSE OVERALL; Nut Height: 0.328 INCHES NOMINAL IN. 5 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.