HSS-E-PM NPT Machine Tap, 1/4-18 Tap Thread Size, AlTiX Coated

Universal taps- designed for use in a wide spectrum of materials with high process reliability. - HSS-E-PM tool material for maximum wear resistance. - Reduced coefficient of friction due to the new high-performance coating. - Special geometry for optimum chip evacuation. Application: Tapered pipe threads NPT to ANSI B1.20.1- for threads with sealants. See the table for the specified minimum size of the tapping hole. Recommendation: Tapping hole dia A: Pre-drill a plain hole without using a reamer. Tapping hole dia B: Pre-drill a plain hole and then ream it using a 1:16 taper reamer see No. 162650. The taper bore dia can then be checked laterally by reference to the Dmax check dimension see table. Variant B for drilling the tapping hole offers the best process reliability for the tapping operation. Threads per inch: 18 Overall length L: 100 mm Shank dia Ds: 11 mm Shank square : 9 mm Tapping hole dia A: 11.1 mm Tapping hole dia B: 10.75 mm