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, Concentricity or Runout Gage Systems, and integration of process control Systems for optimal manufacturing efficiency.. Complete product line of GO and NOT GO Thread and Cylindrical Gages.