ASME B1.13M pdf download METRIC SCREW THREADS: M PROFILE 1GENERAL1.1 Scope This Standard contains general metric standards fora 60 deg symmetrical screw thread with a basic ISo68-1 profile designated M profile.The M profile threadsof tolerance class 6H/6g are intended for metric applica-tions where inch class 2A/2B have been used. At theminimum material limits, the 6H/6g results in a looserfit than...