Brass (IS 319) - Standard (AL MS S.S. also available).FinishNickel plated-Standard. (TinCadmiumChrome also available)ThreadsBSC - Standard (In PGMetricNPTBSP-also available) Ref. StandardIS 2148 - 1981CMRI Certificate NoCMRITCPH638, ApplicationFlamepoof used in flammable gas vapor area (Gas l, llA and llB)