PLEASE NOTE, NPT Taper Thread Size is a nominal pipe size and it does not represent the actual diameter. Please look the size chart for the specific thread diameter. NPT thread has a 60° taper, so usually unable to screw the thread to the end。
1/4 NPT cap is suitable for pipes with a nominal inner diameter of 1/4 inch. This refers to the pipe's nominal internal diameter (approximately 6.35 mm).The outer diameter (O.D.) of the 1/4 NPT thread is 1/2 inch (approximately 12.7 mm)。 3/8 NPT cap is suitable for pipes with a nominal inner diameter of 3/8 inch. This refers to the pipe's nominal internal diameter (approximately 9.53 mm).The outer diameter (O.D.) of the 3/8 NPT thread is 5/8 inch (approximately 15.9 mm)
Our caps are made of premium brass for corrosion resistance, high temperature ductility and low magnetic permeability.
A rubber gasket is fitted inside to provide a reliable seal without slipping. Wrap with Teflon tape to ensure a watertight seal.
External hex head enables easy installation and removal by adding bearing force when applying a wrench.
Sutekus durable brass pipe caps with rubber gaskets are used for connecting, terminating, controlling flow, and changing the direction of piping in many different industries.