The common thread ring gauge and plug gauge are used to calibrate the thread work pieces in GB-197-81 and ISO Standard. METRIC ISO & UNIFIED THREAD PLUG GAGES AND RING GAGES Plug gages Go & NoRing Gages Go & NoGo with Handle 6HGo 6GSize (mm)Model No.Model No.M2.0x.40617-0011618-1011M2.0x.25617-0012618-1012M2.2x.45617-0021618-1021M2.2x.25617-0022618-1022M2.5x.45617-0031618-1031M2.5x.35617-0032618-1032M3.0x.50617-0041618-1041M3.0x.35617-0042618-1042M3.5x.60617-0051618-1051M3.5x.35617-0052618-1052M4.0x.70617-0061618-1061M4.0x.50617-0062618-1062M4.5x.75617-0063618-1063M5.0x.80617-0071618-1071M5.0x.50617-0072618-1072M6.0x1.00617-0081618-1081M6.0x.75617-0082618-1082M6.0x.50617-0083618-1083M7.0x1.00617-0084618-1084M8.0x1.25617-0091618-1091M8.0x1.00617-0092618-1092M8.0x.75617-0093618-1093M8.0x.50617-0094618-1094M10.0x1.50617-0101618-1101M10.0x1.25617-0102618-1102M10.0x1.00617-0103618-1103M10.0x.75617-0104618-1104M10.0x.50617-0105618-1105M12.0x1.75617-0111618-1111M12.0x1.50617-0112618-1112M12.0x1.25617-0113618-1113M12.0x1.00617-0114618-1114M12.0x.75617-0115618-1115M12.0x.50617-0116618-1116M14.0x2.00617-0121618-1121M14.0x1.50617-0122618-1122M14.0x1.25617-0123618-1123M14.0x1.00617-0124618-1124M14.0x.75617-0125618-1125M14.0x.50617-0126618-1126M16.0x2.00617-0131618-1131M16.0x1.50617-0132618-1132M16.0x1.00617-0133618-1133M16.0x.75617-0134618-1134M16.0x.50617-0135618-1135M18.0x2.50617-0141618-1141M18.0x2.00617-0142618-1142M18.0x1.50617-0143618-1143M18.0x1.00617-0144618-1144M18.0x.75617-0145618-1145M18.0x.50617-0146618-1146M20.0x2.50617-0151618-1151M20.0x2.00617-0152618-1152M20.0x1.50617-0153618-1153M20.0x1.00617-0154618-1154M20.0x.75617-0155618-1155M20.0x.50617-0156618-1156M22.0x2.50617-0161618-1161M22.0x2.00617-0162618-1162M22.0x1.50617-0163618-1163M22.0x1.00617-0164618-1164M22.0x.75617-0165618-1165M22.0x.50617-0166618-1166M24.0x3.00617-0171618-1171M24.0x2.00617-0172618-1172M24.0x1.50617-0173618-1173M24.0x1.00617-0174618-1174M24.0x.75617-0175618-1175M24.0x.50617-0176618-1176M27.0x3.00617-0181618-1181M27.0x2.00617-0182618-1182M27.0x1.50617-0183618-1183M27.0x1.00617-0184618-1184M27.0x.75617-0185618-1185M27.0x.50617-0186618-1186M30.0x3.50617-0191618-1191M30.0x3.00617-0192618-1192M30.2x2.00617-0193618-1193M30.3x1.50617-0194618-1194M30.0x1.00617-0195618-1195M30.0x.75617-0196618-1196M33.0x3.50617-0201618-1201M33.0x3.00617-0202618-1202M33.0x2.00617-0203618-1203M33.0x1.50617-0204618-1204M33.0x1.00617-0205618-1205M33.0x.75617-0206618-1206M36.0x4.00617-0211618-1211M36.00x3.00617-0212618-1212M36.0x2.00617-0213618-1213M36.00x1.50617-0214618-1214M36.0x1.00617-0215618-1215M39.0x4.00617-0221618-1221M39.0x3.00617-0222618-1222M39.0x2.00617-0223618-1223M39.0x1.50617-0224618-1224M39.0x1.00617-0225618-1225