Century Drill & Tool (2 pc combo pack) 8.0 x 1.25 TAP & H Drill. Century Drill & Tool (qty. 1) 8.0 x 1.25 TAP & H Drill. High carbon steel metric plug tap and drill bit. Precision cut threads for accurate threading. Tap offers precision cut threads, accurately formed for consistent, exact threading. Tap is heat treated and tempered for file hard threads, and longer, useful life (97413)