The Nut,self-Locking,assembled Washe, cataloged under National Stock Number 5310-01-007-4878, 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 17 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-007-4878 |
| Primary Part Number | ST3M426C7M |
| Item Name | Nut,self-Locking,assembled Washe |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Washer Outside Diameter | 0.760 INCHES MAXIMUM IN |
| Width Across Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Thread Pitch Diameters | +0.4050 TO 0.4091 INCHES IN |
| Material Document and Classification | AMS5735 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.067 INCHES MINIMUM AND 0.077 INCHES MAXIMUM NUT IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.438 INCHES IN |
| Specification/standard Data | 76301-ST301-ST3-426 MANUFACTURERS STANDARD |
| Counterbore Diameter | 0.475 INCHES MINIMUM AND 0.484 INCHES MAXIMUM NUT IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.326 INCHES MINIMUM AND 0.336 INCHES MAXIMUM IN |
| Nut Style | PLAIN DISHED |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| 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 |
|---|---|
| TLN1002CD3-7 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M426C7M PRIMARY | The Boeing Company Div Defense (USA) |
| TLN10020D3-7 PRIMARY | Huck International, Inc (USA) |
| TLN1002CD3-7 PRIMARY | Huck International, Inc (USA) |
| HW49660-7 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| TLN1002CD3-7 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| TLN1002CD3-7 | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| TLN1002CD3-7 | 5/9 Secondary reference U.S. Government activity |
| TLN1002CD3-7 | 5/9 Secondary reference U.S. Government activity |
| TLN10020D3-7 | 5/9 Secondary reference U.S. Government activity |
| ST3M426C7M | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-007-4878 is a Nut,self-Locking,assembled Washe, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-007-4878 has 5 manufacturer part numbers on file: TLN1002CD3-7 (Reid Products Inc. Dba Reid Products Inc), ST3M426C7M (The Boeing Company Div Defense), TLN10020D3-7 (Huck International, Inc), TLN1002CD3-7 (Huck International, Inc), HW49660-7 (Howmet Global Fastening Systems Inc).
Key specifications for ST3M426C7M: Lubrication: DRY FILM LUBRICANT; Overall Height: 0.383 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN; Washer Outside Diameter: 0.760 INCHES MAXIMUM IN; Width Across Flats: 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN. 17 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.