These fasteners provide toad-bearing threads in thin sheets as hard as Rockwell B 88 HS 183 and permit up to .030" 0.76 mm adjustment for mating hole misalignment.The self-clinching feature offers fast and simple assembly. The fasteners are squeezed into properly sized holes using any standard press. The sheet remains flush on one side,Place fastener into the anvil hole and place the mounting hole over the shank of the fastener.