nuts › plain hexagon nuts
NAS509L4
Drilled Hex Nut
Description
Material - 4130 Alloy Steel Per AMS-S-6758 Finish - Cad Type II, Class 2 Per AMS-QQ-P-416 Heat Treat- 150 KSI Min Per AMS2759 Hardness - 34-38 HRC
Specifications
| Bearing Surface Finish | 125 microinches |
|---|---|
| Bearing Surface Type | Chamfered or washer faced |
| Countersink Angle | 110.0 degrees both ends |
| Drilled Hole Diameter | Between 0.045 inches and 0.050 inches |
| Hardness Rating | Between 34.0 rockwell c and 38.0 rockwell c |
| Hole Configuration Style | Configuration b |
| Hole Type And Quantity | 3 drilled |
| Material | Steel |
| Material Specification | Cond c4 military specification single material response mil-s-6758 |
| NIIN | 00-825-0783 |
| NSN | 5310-00-825-0783 |
| Nut Height | 0.188 |
| Nut Style | Hexagon |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Cl 2 federal specification single treatment response type 2 qq-p-416 |
| Thread Class | 3b |
| Thread Dash | LH - L4 |
| Thread Direction | Left-hand |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | Unjf (fine thread with external controlled root radius) |
| Thread Size | 0.250, 1/4-28 UNJF-3B |
| Weight | .005 lb |
| Width Across Flats | Between 0.428 inches and 0.440 inches |
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Catalog data updated 2026-07-05. Report a data error