Goliath 1"-11 BSPT HSS Bottoming Tap

Description 1″ x 11 BSPT Bottoming HSS Tap – Goliath HSS Bright Finish BSPT 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. Note that Pipe Taps sizing is nominal, and not the actual diameter of the tap. 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. British Standard Pipe Taper (RC Series Pipe Taper) is based on the Whitworth thread form – a symmetrical V-thread with an angle of 55°. BSPT has been widely adopted internationally for interconnecting and sealing pipe ends by mating an external (male) with an internal (female) thread. The thread diameter increases along the length of the thread allowing the coupled pipes to form a seal when torqued as the flanks of the threads compress against each other. The taper is “1 to 16”, meaning that for each 16 mm increase in the distance from the end, the diameter increases by 1 mm. 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. Goliath part number C87XHC5. Diameter large end 1.3402 inch Drill Diameter (mm): 30 Lead: Bottoming Overall Length (mm): 109 Pitch (mm): 11 Tolerance: to suit # Flutes: 4 Standard: BS949: Part 3: ISO2284-1976 Thread Form: BSPT Rc for Tapered Threads