Asimeto Plug Thread Gauge (Go/NoGo) - Imperial - Right Hand - ASMEB1.20.1-2013 - 3/8 x 18Asimeto Plug Thread Gauges (Go NoGo) in Imperial sizes are precision tools for quality control professionals who verify internal thread accuracy. This right hand gauge is sized for 3 8 x 18 threads and aligns with ASMEB1. 20. 1 2013 standards, delivering reliable go no go results during inspection and assembly. Go NoGo design: Separate go and no go elements provide quick, decisive checks of thread depth and tolerance. Imperial size: 3 8 x 18 threads,