Tools & Gear Taps & Dies Chrome Alloy Taps

4850-1/8 1/8 x 28 BSPT Chrome Alloy Die Nut British Standard Pipe Taper (BSPT). Die nuts are commonly used when a button die is not suited due to work space restrictions and / or on site thread accessibility. They can be used as thread chasers to clean an existing thread. They can also be used to create a new male thread on non-ferrous metals and plastics. Chrome alloy dies are not suitable for creating precision, safety or critical threads. 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.