-Square drive allows installer to use greater torque when tightening and reduces chance of driver slipping out of fastener.
-Used to “tap” their own mating internal thread when driven into preformed holes in metallic materials.
-Does not require a preformed hole in wood.
-Case hardened so surface has a minimum Rockwell Hardness of C45.
-Manufactured from AISI 1016 Steel.
-All sizes are fully threaded.
-Zinc plated to meet ASTM Specification F1941.
-Screws conform to the dimensions of ASME B18.6.3