Reference Table

Our Tap Drill Reference Table is a must have for any toolmaker, machinist or mechanic. The double-sided guide features a Tap Drill Depth Chart, decimal conversions from 1/6" to 6" and a ruler graduated in 6ths. The Tap Drill Reference Table works with National Fine, National Course, American Standard Pipe and Metric threads. -Features & Benefits : Essential tap drill and decimal equivalentsreference table for toolmakers, machinists andmechanics Front has machinescrew size tapdrill chart forrecommended75% depth thread Back has decimal equivalents table in 64thsfrom 1/64" to 63/64" For National Fine and National Coarse,American Standard Pipe and metric threads Convenient 6" rule is graduated in 64ths