WE WELD M8 (METRIC 8MM) NUTS ON TO A 1008 CRS ON A 75 KVA SCIAKY MACHINE. AFTER WELDING IS COMPLETE SMALL GLOBULES OF METAL OR SPATTER STICK ON TO THE THREADS OF THE "NUT". WE ARE FORCED TO TAP THE NUT AFTER WELDING TO MEET THE GAGE REQUIREMENTS. PLEASE SUGGEST WHETHER TAPPING CAN BE AVOIDED.