IS: 2643-1975-Pipe threads for fastening purpose: Limits of sizes
Indian Standard Institution
IS: 2643-1975-Pipe threads for fastening purpose: Limits of sizes - I.S.I Manak Bhavan 1975 - 2
IS: 2643-1975-Pipe threads for fastening purpose: Limits of sizes - I.S.I Manak Bhavan 1975 - 2