316L stainless steel threaded welding sleeve 1''1/2 gas for screw plug immersion heater

316L stainless steel 1''1/2 gas threaded sleeves to be welded to the surface of a tank or to the end of a tube for the installation of a screw plug immersion heater. The welding sleeve is the ideal solution when the inside of the tank is not accessible. It allows the threaded immersion heater to be screwed on from the outside and guarantees a perfectly watertight installation thanks to its sealing surface.