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DIN261 DIN787 DIN186 ASME B18.5 AWWA C111-A21.11 T Bolts Wholesale to Hongkong Related Video:
One method of removing a hex screw when the head has been stripped out. NOTE: While the original problem remains unchanged, I now find the HEX screw was the STAR type and using an Allen wrench in the beginning only made the problem worse, duh!