Thread Ring Gages

Sr. No Thread Type Size Range Standard 1 Metric M 1.0 to M 200 International Organisation for Standardization(ISO) Basic Dimension : ISO:724-1978(E), ISO:9651-1980(E) Gauging Practice : ISO:1502-1978 (E) Indian Standard (IS) Basic Dimension : IS4218 part III- 1976, IS4218 part IV-1976, IS 2334-1975 2 Unified ( UNC, UNF, UnEF, UNS, UN) No. 1-64 to 4” American Standard Basic Dimension : ANSI ASME B1. 1-1982 Gauging Practice : ANSI ASME B2. 1-1982 Class of Fit : Plugs : 2B (Medium) Rings : 2A (Medium) British Standard : Basic Dimension : B.S. 1580 – 1962, Gauging practice : B.S. 919 Part I1960 3 Whit worth (BSW, BSF) 18” to 4” Basic Dimension : B.S. 84-1956