BS 1157:1975

Recommendations for tapping drill sizes for use with fluted taps|Taps (threading), Drills, Cutting tools, Size, Dimensions, ISO metric threads, Thread pitch, Unified screw threads, Whitworth screw threads, British Association screw threads, Threading tools, Pipes, Threads, G-series screw threads, R-series screw threads Click the banner to get it at ONLY: GBP164.00