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Easy-to-use printable tap drill chart and drill bit sizes table available for a FREE download on our website. View drill and tap chart ---->
Tap & Drill Chart: Screw/thread size, major and minor diameter, drill size, decimal equivalent. Tapped hole, close fit, and free fit clearance holes.
A tap drill chart is a machinist’s must-have reference document that contains drill bit sizes, tap sizes, and their equivalent thread specifications that guide an engineer in fabricating threads and drill holes.
Converting between inch and metric will help finding drills of similar size. The recommended practice for roll taps is to drill and ream the hole. The thread dimensions are formed by a combination of the tap and tap drill size; this recommendation chart is a starting point.
Tap Drill Chart: Tapped Hole Stainless Steel, Steels, Iron – Microform Precision. Screw Thread Size Major Diameter Minor Diameter Drill Size Decimal ... 7/8"-20 0.875" 0.8137" 27/32" 0.8438" 15/16"-20 0.9375" 0.8762" 29/32" 0.9062" 1/2"-13 0.5" 0.4056" 29/64" 0.4531" 1-20 1" 0.9387" 31/32" 0.9688" ...
Our tap and clearance drill charts are available as an Adobe Acrobat PDF file. You can print this file to use in your shop. To download the file, right-click the link below and choose Save Target As or Save Link As. This tap and clearance drill chart shows tap and clearance drill sizes for standard threads.
tabella prefori / gewindekernlÖcher / diamÈtres de perÇage tap drill sizes 37 npt - nptf Ø mm a Ø mm b 1 1/16 - 27 5.94 6.15 1 1/8 - 27 8.33 8.43 1 1/4 - 18 10.72 11.13