NPT STANDARD SIZE: 3/4" Male x 3/4" Male NPT Thread Hex Nipple, Pipe fittings adapter for connecting two NPT female threaded pipes. HIGH-QUALITY 304SS: Our hex nipple made of high-quality thickened 304 stainless steel, nickel and chromium elements combined, corrosion resistance, strong oxidation resistance. High abrasion resistance, high corrosion resistance, not easy to rust under humid environment. WIDELY APPLICATIONS: Male NPT threads for connecting to female threaded pipes, this premium pipe fitting can be used to connect various pipes. suit for connecting and extending pipes. EASY TO INSTALL: Male to male adapter are a way of connecting pipes. The threads of this type of fitting are male and are used to connect female threaded pipes. It is very convenient to install, easy to dismantle, compact and firmly connected. Good sealing performance, not easy to leak. APPLY FOR: Hydrant pipe, air compressor, extended hose, air pipe, fuel pipe as well as air tools, natural gas line and irrigation applications, etc.This pipe fitting can apply to air, gas, oil, and fuel.