Hex Head Black Steel Plugs Are Used For Use With Gas or Hot Water Heating Systems.
Hex Head Black Steel Plugs are made of Standard Class 150 Black Steel for long lasting durability and dependability. Black Steel fire and corrosion resistant properties make it especially useful for natural gas or hot water heating systems or plumbing applications. Not recommended for use with potable water applications. Available in 1/8, 1/4, and 3/8 inch diameter sizes with 150 PSI rating and 1-1/2 inch diameter size with 300 PSI rating.