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NPT - Briggs Standard Pipe threads - Taps and Drill Sizes. The NPT - National Pipe Taper Threads - is based on the Briggs Standard Pipe Thread. Drill sizes for Briggs Standard Pipe taps for direct tapping without reaming are indicated below:
Machinist Metric ISO Screw Thread Tap - Drill Size Chart. The following is a ANSI Standard Pipe Thread Recommended Tap size and Drilled Pilot Hole for Taper. National Pipe Thread Taper ( NPT ) is a U.S. standard for tapered threads used on threaded pipes and fittings .
Find the complete standard NPT tap drill sizes chart, including decimal equivalents for accurate conversions. Easily reference tap drill sizes from 1/16 to 3 inches for precise machining and threading applications.
TECHNICAL RESOURCE GUIDE | TAP DRILL CHART. Phone: 1.800.221.0270 | Fax: 1.800 ... Tap Size Decimal Equivalent Decimal Equivalent Drill Size NPT & NPTF (Taper) Drill Size NPS (Straight) PIPE TAP SIZES TAP DRILL SIZES (75% prob. thread) #0-80 1.6mm x .35 #1-64 2mm x .4 #1-72 #2-56
National Pipe Threads Tap Drill Chart. NPT and NPS threads share similarities in thread angle, shape and pitch (TPI – threads per inch). However, they differ in their design: NPT threads are tapered, while NPS threads are straight (parallel). Both types feature a 60° included angle.
Drill Size Decimal eQUiValeNT meTric Tap Drill SizeS Tap Size meTric Tap Tap Drill (mm) Decimal (inch) 19. 32 39. 64 5. 41 8. 64 21. 43 32. 64 11. 45 16.
