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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 #2-64 2.5mm x .45 #3-48 #3-56 #4-40 #4-48 3mm x .5 #5-40 #5-44 3.5mm x .6 #6-32 #6-40 4mm x .7 #8-32 #8-36 #10-24 #10-32 5mm x .8 #12-24 #12-28 6mm ...
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 .
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:
21 Ιουλ 2024 · An NPT Tap Drill Chart is a handy reference tool that tells you exactly what size drill bit to use when preparing a hole for NPT (National Pipe Thread) tapping. It's like a recipe book for creating perfect pipe threads every time.
Thread milling requires the same predrill diameter as tapping. Easily find the diameter of drill your thread form and size require. Tap drill charts include UN, Metric (ISO), NPT, BSP and much more.
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.
