https://www.cnmfrs.com/product/landeepipefitting/npt-theaded-bull-head-plug-astm-a105-dn50-sch-80.html
NPT Threaded Bull Head Plug, ASTM A105, DN50, SCH 80 - China Manufacturers
NPT Threaded Plug Producer in China: NPT Threaded Bull Plug, Head Type, Made of Carbon Steel ASTM A105, Size DN50, Wall Thickness Schedule 80.
npt threaded bull head