screws › socket head cap screws
NAS1351-4H28P
Socket Head Cap Screw
Description
Fastener Length: 1-25/32", Hole Diameter: ", Thread: 1/4-28, Head Width: 3/16", Thread Length: 1
Specifications
| Fastener Length | 1.000 inches minimum and 1.781 inches maximum |
|---|---|
| Hardness Rating | 38.0 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 |
| Hole Configuration Style | Round longitudinal hole |
| Hole Diameter | 0.062 |
| Hole Quantity | 4 |
| Hole Type | Drilled |
| Internal Drive Style | Hexagon |
| Length | 1 25/32 |
| Material | Steel |
| Material Specification | 66 fed std single material response |
| Min. Tensile Strength (psi) | 170000 pounds per square inch |
| Minimum Yield Strength | 150000 pounds per square inch |
| Specification Data | 80205-nas1351 professional/industrial association standard |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 ty 2 cl 2 fed spec single treatment response |
| 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 | UNRF |
| Thread Size | 1/4 |
| Width Across Flats | 0.187 inches minimum and 0.190 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1351-4H28P. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error