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1911 STOCK TAPS
These Brownells high speed steel taps are for tapping/ chasing pre-existing threads in 1911 frames. The 0.236”-60 TPI tap is for tapping frames so that bushings can thread into the frame. The 0.150”-50 TPI tap is for tapping the actual bushings for the grip screws.
Recommended tap drill sizes:
0.150”-50 TPI = #30 drill (0.1285”)
0.236”-60 TPI = 7/32” drill (0.2188”)