Tools & Gear Taps & Dies HSS Hand and Machine Taps

B82ZKAC4 1/4" x 18 NPS Bottoming HSS Tap - Goliath HSS Bright Finish NPS 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. National Pipe Straight (NPS) - Parallel - made to American Standards). Used for free-fitting mechanical joints where thread sealing is not required. 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. Bottoming Taps are typically preceded by the use of a Taper or Intermediate Tap. Manufactured from HSS this general purpose tap is designed for use in medium tensile materials and is for hand or general machine use.