UNC 9/16" Hex Bolt Set Screw High Tensile 8.8 Self Colour Black
CARBON SELF COLOUR High Tensile, UNC Hex Bolts and Hex Sets. 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).