The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-134-5784, 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 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-134-5784 |
| Primary Part Number | 79318CM-820 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Washer Outside Diameter | 0.725 INCHES MINIMUM AND 0.770 INCHES MAXIMUM IN |
| Width Across Flats | 0.633 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT MAXIMUM DEGF |
| Washer Thickness | 0.030 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Style | SLOTTED HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20.0 PCT MIN VISIBLE SURFACE |
| Material | IRON ALLOY 660 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 |
|---|---|
| E12589-8 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 79318CM-820 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BH788-8 PRIMARY | Bristol Industries, Llc (USA) |
| Reference | Meaning |
|---|---|
| 10109706 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| E12589-8 | 5/9 Secondary reference Harvard Industries Inc |
| ST3M788-8 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5310-01-134-5784 is a Nut,self-Locking,extended Washer, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-134-5784 has 3 manufacturer part numbers on file: E12589-8 (Sps Technologies, Llc Dba PB Fasteners), 79318CM-820 (Sps Technologies, Llc Dba PB Fasteners), BH788-8 (Bristol Industries, Llc).
Key specifications for 79318CM-820: Lubrication: DRY FILM LUBRICANT; Overall Height: 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN; Washer Outside Diameter: 0.725 INCHES MINIMUM AND 0.770 INCHES MAXIMUM IN; Width Across Flats: 0.633 INCHES NOMINAL IN. 14 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.