UNF Self Colour 12.9 Grade Socket Cap Head Bolts & Screws 1/4" To 1/2"
Thread - UNF (AF). High Tensile Socket Cap Screws. Size x thread pitch. Material - Steel, None plated self colour. Type - Part threaded or Fully thread available. Grade - 12.9 (1936 - 1960) High Tensile Steel.