GlowShifts 3/8-18 NPT Drill and Tap Kit is ideal for anyone looking to drill and tap a hole for a specified use in their car or truck. The featured ⅜-18 NPT Tap can be used to tap the drilled ⅜” hole to 18 NPT for intake temperature gauge sensors in order to provide optimum results with extremely accurate temperature readings.
Whenworking with pipes and fittings, it is important to know the proper tap drill size for the job. A ¼ NPT tap drill size is a standard size used when tapping a hole in metal to accept a ¼ inch of National Pipe Thread (NPT). This size is used with a variety of pipe and fitting sizes, including 1/8, 1/4, 3/8, 1/2, and 3/4-inch NPT threads.Installationof HELI-COIL® Pipe Thread Inserts for NPT and ANPT Standard shop practice is followed. Variations in material, drills and drilling equipment may make larger or smaller drills necessary to produce acceptable threads. Drill to depth given in Col. 3 or 4. Use standard reaming procedure.
Checkexternal NPT thread size and taper. For Thread Type: For Thread Location: For Pipe Size. Wd. Ht. Thick. Color : Each: Aluminum. NPT. External: 1/16, 1/8, 1/4, 3/8, 1/2. 2" 3" 1/4 " Blue: 8/64 " Stainless Steel: Tap and Drill Sizes for UNF, UNC, Metric ISO, and American Standard Pipe Thread Sizes Decimal Equivalent Table for 1/64" to