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NAS1351-4LL28P
Socket Head Screw
Description
Fastener Length: 1-25/32", Thread: 1/4-28, Head Width: 3/16", Thread Length: 1-"
Specifications
| Fastener Length | 1.734 inches minimum and 1.781 inches maximum |
|---|---|
| Hardness Rating | 36.0 rockwell c minimum and 45.0 rockwell c maximum |
| Head Diameter | 0.365 inches minimum and 0.375 inches maximum |
| Head Height | 0.244 inches minimum and 0.250 inches maximum |
| Head Style | Flat chamfer |
| Internal Drive Style | Hexagon |
| Length | 1 25/32 |
| Locking Feature | Strip threads |
| Material | Plastic |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Minimum Yield Strength | 130000 pounds per square inch |
| Specification Data | 80205-nas1351 professional/industrial association standard |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416,type 2 class 2 fed spec single treatment response fastener |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 1.000 inches minimum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Width Across Flats | 0.187 inches minimum and 0.190 inches maximum |
Cross-reference
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Catalog data updated 2026-07-05. Report a data error