1-1/2-12 unjf-3a nogo
Mercury 1-1/2-12 UNJF-3A NoGo Lo Threaded Ring Gage Gage#1
A nice detail of the GMEV32BR-WCPL is the visible status indicator light.
Mercury 1-1/2-12 UNJF-3A NoGo Lo Threaded Ring Gage Gage#2
What I like about the HBN 0.5microns is its ability to work with different media.