UNF 7/16" Hex Bolt and Set Screws High Tensile 8.8 Zinc BZP
CARBON ZINC CR+3 High Tensile, Bolt, 5 Grade Steel (8.8) UNC and UNF high tensile standard is marked with an, '5'. A screw is fully threaded from underneath the head and a bolt is partially threaded (has a part-plain shank/ shoulder).