Plastic Pipe Joywayus Internal Hex Head Pipe Plug Socket M14x1.5 Hex Head Pipe Fitting Fittings are available threaded or unthreaded, in many shapes, styles, sizes, and schedules (pipe wall thickness). Precise Dimensions Pipe Fittings: Thread: 1-1/4NPT; Length: 20mm / 25/32; Operating Range: -100°F to 660°F (-73°C to 349°C); Max Pressure Rating: 290... Thread Size : 1-1/4 NPT Male NPT 1-1/4 Male Threaded Hex Head Pipe Plug, TTZEZE Great for blocking off intake manifold water ports, water pump ports, water temp and oil sender holes, engine block Made from soild stainless steel for strength Best offers Stainless Steel Pipe Plug 1 1/4" Forged Threaded Hex Head Plug 3000# 304 Stainless 1-1/4 Inch Pipe Cap 3000psi · View More Details The plug inserts into female pipe and has an outer hexagonal head for increased leverage with a wrench during installation and disassembly. Pipe fittings are components used for connecting, terminating, controlling flow, and changing the direction of piping in many different industries. It is made of stainless steel which is high strength and has greater corrosion resistance than brass and has NPT threads for creating a tighter seal than straight threads.