Tools & Gear Taps & Dies HSS Pipe Taps and Reamers

C83ZKEC4 3/8" x 18 NPTF Bottoming HSS Tap - Goliath HSS Bright Finish NPTF Hand and Machine Bottoming Tap. Pipe taps are much shorter than a similar size of regular hand tap, but the design features are the same. Goliath HSS taps provide a high hardness to toughness ratio, compressive and tensile strength, good abrasion resistance and resistance to micro-chipping, ensuring a long tool life. Tapered Pipe Taps are used for tapered threading by hand or machine. National Pipe Taper Fuel (DRYSEAL TAPER) is a semi-compatible variant of NPT, designed to provide a more leak free seal without the use of teflon tape or other sealant compound. NPTF threads are the same basic shape but with crest and root heights adjusted for an interference fit, eliminating the spiral leakage path. Bottoming Taps have a lead of two threads and are used to ensure minimum thread run-out when tapping to the bottom of a blind hole. Manufactured from HSS this general purpose tap is designed for use in medium tensile materials and is for hand or general machine use.