Check the listing for details. 5Pcs PT 1/4 Carbon Steel Male Thread Internal Hex Pipe Plug Fitting Socket. Condition: New. Listed at 8.69 USD. Description:Material - The pipe plug fittings are made of carbon steel with good strength and hardness, which has good anti-rust, anti-corrosion, and anti-oxidation performance. The structural design enables it to withstand high pressure and ensure long-term durability, suitable for indoor and outdoor humid environmentsFeatures - The internal hex thread socket pipe cap is a mechanical fastener, and the male pipe threads are designed for connecting to female threaded pipes or fittings to provide a tighter sealing effect for the threaded hole. It is mainly used to close the end of the pipe or fittings to effectively prevent the leakage of gas or liquidEasy to Use - The pipe fitting plugs are designed with a hex drive countersunk head and can be quickly installed and removed.