Keywords: API gage, API gauges, spec 5b, spec7, spec 11b, api master thread gauges, Casing, Line Pipe, Extreme Line Casing, NC Connections, Full Hole, rotary gages,H-90, slim line, AOH, PAC, BECO, Sucker Rod gage, extra hole, External Upset, Non Upset, Tapered Thread Gages, ISO 10424