DrillSize Equivalents (in) Equivalents (mm) 1⁄16 " NPT: 27: 15/64: 0.2344: 5.9531: C: 0.242: 6.1468: 1/4: 0.25: 6.35: 1/8" NPT: 27: 21/64: 0.3281: 8.3344: Q: 0.332: 8.4328: 11/32: 0.3438: 8.7313: 1/4" NPT: 18:
StandardNPT National Pipe Thread Tap Drill Sizes Table. NPT National Pipe Thread Size Tap Drill Size (in.) Decimal Equivalent (in.) 1/16 - 27 "C" 0.242:
Whendrilling the pilot hole before tapping, the hole should be smaller than the tap but large enough for the tap to cut the edges. If you feel overwhelmed with the 1/4-28 tap drill size, I got you! I decided to pen down this article, sharing all the nitty-gritty about sizing and thread percentage, hoping to make things clearer for you.
DrillBit Size. 1/4″ 20 Tap. #7. 13/64″. 1/4″ 28 Tap. #3. 7/32″. Tapping threads is a fundamental aspect of many DIY projects, but it’s not as straightforward as it seems. A precise balance must be struck when selecting the hole size for the tap to work effectively.
Commonlyused sizes are 1/⁄ 8 , 1/4 , 3/⁄ 8 , 1/2 , 3/4 , 1, 1 1/⁄ 4 , 1 1/2
116" Carbon Steel NPT Tap and "D" HSS Drill Bit Kit. NPT Tap and Drill Set comes in an easy to maintain plastic pouch; Set contains one Carbon Steel NPT Pipe Tap and the matching size Black Oxide High Speed Steel Drill Bit; Carbon steel NPT pipe taps are designed to clean and or re-thread damaged or jammed pipe threads
77MKfW. 426 2 408 112 299 407 394 392 334
1 4 npt thread drill size
