TAPPINGDRILL SIZES IMPERIAL THREADS Tap Size B.S Whit U.N.F U.N.C B.S.F B.S.P B.A Drill Size Drill Size Drill Size Drill Size Drill Size Tap Size Drill Size M 18 1.5 16.5mm M 18 2.5 15.5mm M 20 1.5 18.5mm M 20 2.5 17.5mm M 22 1.5 20.5mm M 22 2.5 19.5mm M 24 2.0 22.0mm M 24 3.0 21.0mm M 27 3.0 24.0mm UNFBRITISH STANDARD FINE (55º) UNIFIED NATIONAL FINE (60º) #3 (.099) 56 2.1 5/16 18 6.5 3/8 16 7.9 7/16 14 9.3 1/2 12 10.5 9/16 12 12.1 5/8 11 13.5 3/4 10 16.25 7/8 9 19.25 1 8 22.0 16 (55º) Tap Size TPI Drill Only* Drill & Reamer Rc 1/16 28 6.4 6.2 Rc 1/8 28 8.4 8.4 Rc 1/4 19 11.2 10.8 20 .9387. 61/64. .9531. 31/32. .9688. This tap and clearance drill chart shows tap and clearance drill sizes for standard threads. There is also a printable version that has both metric and inch threads. 916"-18 UNF HSS Tap Set, Tap America SKU: T/A54768 Ships Today! (Order By 3pm EST M-F) List Price: $95.24 Price: $50.48 (You Save $44.76) 9/16"-18 UNF HSS Tap Set, Tap America Special Tap and Drill Bit Size Calculator; Metric Tap Drill Bit Size Calculator; Tap Wrench Chart; 4,951. Certified reviews. THREADSCREW - Drill & Tap Chart Machine Screw Size Threads Per Inch Minor Dia Tap Drills Clearance Hole Drills Alum, Brass, & Plasitcs 75% Thread Stainless Steel, Steels & Iron 9/16-18 UNF 18 .5625 .5264 .4943 .5024 33/64 5/8-11 UNC 11 .6250 .5660 .5135 .5266 17/32 5/8-18 UNF 18 .6250 .5869 .5568 .5649 37/64 InStock Order Online. 9/16-18 UNF tap straight flute bottom tap made by HSS RH US$15. 9/16-18 UNF left hand thread tap also available (RH=right hand LH= left hand), if need right hand thread tap, no need specially specified, if need left hand tap, it should be specified specially. Size. d. P. L. 916 - 12 UNC : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more Tap Drill Sizes for 9/16 - 12 UNC. If not specified, assume a thread depth of 75%. Inch (UNC/UNF/UNEF) National Pipe (NPT) Dryseal Pipe (BPTF) British Pipe (BSP) ACME; Threading Glossary. Onceyou know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out! 1 9/16 - 18 UNEF : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more. NOTE The tap drill size of a hole that will be cold form tapped is usually bigger than it cutting tap counterpart. Thread percentage: (77% thread is what you want to use) A 100% thread is 3/4 qtr, or (6/8 zNgl.

9 16 18 unf tap drill size