supply of wheel/tyre defect gauge for bg coaches , wheel/tyre defect gauge for bg coaches as per railway boards approved irca part iv, rule 2.8.4 and plate 38, made of 3 mm thick hard alloy steel plate, used for inspection of condemn flange thick ness, root radius, sharp flange, deep flange, flatness of tread etc. of wheel profile. condemning flange thickness of 22 mm & flat face of 50 mm gauges are to be supplied in separate carrying case and workin g manual. the gauges shall be supplied with certification from nabl/nabl accredited or govt. approved la bs. first calibration valid for period two year ( warranty period : up to 30 months from the date of supply) [ warranty period: 30 months after the date of delivery ] ]