American thread ring gauge plug gauge 1/2-13 5/8-11 3/4-10 1/4-20 7/8-9 3/8-16 1/2-13 5/8-11 3/4-10 1/4-20 7/8-9 3/8-16 UNC UNF Thread Ring Gage 2A GO NOGO. byJuly 4, 2026
