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 1/64” to 63/64” and a ruler graduated in 64ths. The Tap Drill Reference Table works with National Fine, National Course, American Standard Pipe and Metric threads.

• Essential reference guide for toolmakers and machinists.
• Front side has machine screw Tap Drill Chart for recommended 75% depth.
• Back side has decimal equivalents table in 64ths from 1/64” to 63/64”.
• 6” rule with 1/64” graduations.
• For National Fine, National Course, American Standard Pipe and Metric threads.