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.

1/8" MT x MCV     3/8" F x MCV
1/4" MT x MCV     1/2" F x MCV
3/8" MT x MCV     3/4" F x MCV
1/2" MT x MCV     1" MT x MCV
3/4" MT x MCV