316 Stainless Steel Hex Plug Class 300 Threaded NPT Casting Fitting

What are the Types of Cast Plug?
Casting plugs are used to safely block unused internal threaded ports on pipe fittings or pipelines. The most common type is the hexagonal head plug (Hex Plug), with its hexagonal head design facilitating installation and removal using standard wrenches, making it easy to operate. In addition, we also offer other types of plugs such as square head (Square Head) and round head (Round Head) plugs to meet different customers' tool usage habits or specific installation space requirements.

Introduction to Thread Types
Threaded pipe fittings primarily follow two major international thread systems: NPT and BSP. The thread angle of NPT (American Standard Pipe Taper Thread) is 60°, relying on the thread's own taper (1:16) for sealing. The thread angle of BSP (British Standard Pipe Thread) is 55°, which is divided into taper threads (BSPT) for sealing and parallel threads (BSPP). This pipe plug adopts NPT threads, which are the most common connection form in North America and the general industrial field.

CF8M/316 Material Properties
The use of CF8M/316 stainless steel ensures excellent durability and corrosion resistance of the pipe plug. Compared to 304 grade, 316 material performs better in resisting chloride and general industrial corrosion due to its molybdenum content. This is particularly important for the pipe plug, as it effectively prevents the threaded part from getting stuck or failing due to corrosion, ensuring long-term sealing reliability and enabling smooth disassembly during future maintenance or system changes.