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6 Απρ 2024 · By selecting the accurate drill size for a 1/4-20 tap, you can ensure optimal tapping results and achieve secure and precise connections. The perfect drill size for a 1/4-20 tap is a #7 drill bit with a diameter of 13/64″. This size is recommended for 1/4″ 20 UNC tap threads.
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.
Tap Drill Chart: Free Fit Clearance Hole, All Materials – Microform Precision. Screw Thread Size Major Diameter Minor Diameter Drill Size Decimal ... 1/4"-20 0.25" 0.1887" H 0.266" 1/4"-28 0.25" 0.2062" H 0.266" 1/4"-32 0.25" 0.2117" H 0.266" 5/16"-18 0.3125" 0.2443" Q 0.332" 5/16"-24 0.3125" 0.2614" Q 0.332" ...
Roll Tap Drill Size Chart. 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. The tap hole size may need to be adjusted based on your specific tolerance, material, and hardness.
9 Σεπ 2018 · The drill size chart below gives fractional sizes and their metric conversions up to 1 inch. Centre Drill Bit Sizes. These specialist drill bits are used for drilling centre holes at two different angles, 60 degrees and 90 degrees.
Tap drill size calculator for Inch and metric threads (For Cutting and Forming Taps). Plus formulas and charts for Tap Drill Size.
DECIMAL EQUIVALENT CHART. Imperial has made a concerted effort to provide accurate information in its catalog and on its website, however Imperial assumes no responsibility for the accuracy of the information.
