EXO®, 1500102000, Thread Limit Gage, Class 2B Short Form, Series: 15001, Measuring System: Imperial, Go/No Go, 5/16-24 Size, Class X Tolerance, 1/2 in Go, 5/16 in No-Go Member Length, UNF Thread, HSS, Bright, 64 HRC Material Hardness Inch plug thread gages are used to inspect pitch diameter and pitch accuracy of internal threads. OSG inch plug gages are manufactured to class X tolerances per ANSI B1.2. Go and no-go gages from OSG are ground from premium HSS and hardened to 64 HRC to ensure superior...