Check the listing for details. 5Pcs Socket Pipe Plugs, NPT 3/8"Stainless Steel Hex Thread Pipe Caps, Silver. Condition: New. Listed at 11.79 USD. Description:Material - This pipe cap is made of stainless steel with a polished surface. The socket pipe plug has high hardness, corrosion resistance, high temperature resistance, durability, and is not easy to damage or rust.Design - The male thread pipe cap has a hexagonal countersunk hole, which is evenly stressed and not easy to slip. The external thread of the socket pipe plug is strong after tightening, not easy to fall off, and has good air tightness, which can effectively prevent the leakage of air, steam, gas, water, oil, and pressure fluid.Easy to Install - The socket pipe plug can be easily installed and removed. The built-in hex countersunk design can be used with a wrench to increase the wrench leverage effect during installation and removal, making it less likely to slip.