Metric plug thread gages are used to inspect pitch diameter and pitch accuracy of internal threads. OSG metric plug gages are manufactured to Class X tolerances per ANSI B1.16M. Go and No-Go gages from OSG are ground premium HSS and hardened to 64Rc to ensure superior wear resistance. Gages are available with short form or long form certificates. To order gages with a short form certificate, use the standard EDP number. To order gages with a long form certificate, use the EDP number ending in “LF”.