Terminal block To be used as a junction on table for connecting Bunsen Burner Taps. Inlet 38 Inch CU x Outlet 4 Nos. 18 Inch BSPF Inlet 38 Inch CU x Outlet 2 Nos. 18 Inch BSPF. There are individual fittings for fixing on M.S. pipeline for obtaining different types of outlets and are used to connect valves regulators and any other fittings on to the pipeline.