M8-1.25X30 Din 7500D Metric Unslotted Hex washer Thread Roll Screw Full Thread Zinc Wax (Pack Qty 900) BC-M830D7500D

Din 7500D Metric Unslotted Hex washer Thread Roll Screw Full Thread Zinc Wax

For use in drilled, punched or cored holes in ductile metals and punch extruded metals. They provide superior prevailing torque than can be achieved with most locking screws. Eliminates chips that result from using thread cutting screws. Requires low drive torque and provides excellent resistance to vibrational loosening. Since these thread rolling screws are case hardened, it is not recommended they be used in die-cast or extruded aluminum or zinc