The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-134-6933, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-134-6933 |
| Primary Part Number | ST3M788-9 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Washer Outside Diameter | 0.850 INCHES NOMINAL IN |
| Width Across Flats | 0.680 INCHES MINIMUM AND 0.692 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Washer Thickness | 0.045 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.562 INCHES IN |
| Thread Class | 313 |
| Thread Quantity Per Inch | 18 |
| 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 |
|---|---|
| E12589-9 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 79318CM-918 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BH788-9 | Bristol Industries, Llc (USA) |
| ST3M788-9 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| E12589-9 | 5/9 Secondary reference Harvard Industries Inc |
| 10109708 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| ST3M788-9 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-134-6933 is a Nut,self-Locking,extended Washer, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-134-6933 has 4 manufacturer part numbers on file: E12589-9 (Sps Technologies, Llc Dba PB Fasteners), 79318CM-918 (Sps Technologies, Llc Dba PB Fasteners), BH788-9 (Bristol Industries, Llc), ST3M788-9 (The Boeing Company Div Defense).
Key specifications for ST3M788-9: Overall Height: 0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN; Washer Outside Diameter: 0.850 INCHES NOMINAL IN; Width Across Flats: 0.680 INCHES MINIMUM AND 0.692 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 10 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.