[Cbc (Aar H Type) Measuring Gauge. A Complete Of Gauges Is Consist Of Following Six Gauges Forinspection And Measurement Of Cbc H Type (Aar H Type ) Coupler . All Gauges Are Made Of Hard Alloy Steel And Hardness 45 50 Hrc With Nickel Plating & Laser Marking. 1. Contour Condemning Limit Gauge (Jaw Gap Gauge) Forchecking Cbc H Type Coupler To Aptp Drawing /Gauge No 34100 1 01 No. 2. Contour Maintenance Gauge (Knuckleprofile Gauge) For Checking Cbc H Type Coupler To Apta Drawing Gauge No. 31