12 pcs 1/8-1 HSS NPT taper pipe thread Tap and Die set

12 pcs 1/8-1 HSS NPT taper pipe thread Tap and Die set. NPT HSS SET Tap and Die Pipe Thread rigth hand. NPT Taper Pipe Tap & Hex Die Set Thread ground high speed steel. Supplied with solid wooden case. Includes one of each of 1/8-27, 1/4-18, 3/8-18, 1/2-14, 3/4-14 & 1-11-1/2 NPT tap & dies. National Pipe Taper NPT (National Pipe Taper) refers to American National Standard Taper Pipe Threads. They are commonly used for general-purpose applications and require a sealant. NPS (National Pipe Straight) refers to American National Standard Straight Pipe. What is the difference between NPT and NPTF taps? While NPT and NPTF thread forms are almost identical, NPT is a general-purpose thread that requires thread sealant for a leakproof seal, and you need to choose the sealant thoughtfully. NPTF creates a strong, leakproof mechanical seal without using a sealant.