Home / Screws, Nuts & Washers / Grub Screws (Set Screws) / Socket Cup Point Grub Screws / UNF (ANSI B18.3) / High Tensile Steel High Tensile Steel 1/4" UNF Socket Cup Point Grub Screws 5/16" UNF Socket Cup Point Grub Screws 3/8" UNF Socket Cup Point Grub Screws 1/2" UNF Socket Cup Point Grub Screws 5/8" UNF Socket Cup Point Grub Screws