Johnson Gage offers a comprehensive range of Portable or Bench External and Internal Thread Inspection Systems for UN, Metric, NPT, and all other thread forms. Options include Fixed Gaging for high-volume inspection to Adjustable Systems for maximum versatility. Runout and Concentricity are simple extensions of the standard configuration. New products for inspection of cylindrical features, reverse-angle thread forms, and Concentricity or Runout Gage Systems. Complete product line of GO and NOT GO Thread and Cylindrical Gages.