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CLASS 2B NOMINAL SIZE CLASS 2B NOMINAL SIZE
GO NO GO GO NO GO
312-1007 312-1008 No2¡ª56UNC 312-1075 312-1076 7/16¡ª32UN
312-1009 312-1010 No2¡ª64UNF 312-1077 312-1078 1/2¡ª13UNC
312-1011 312-1012 No3¡ª48UNC 312-1079 312-1080 1/2¡ª16UN
312-1013 312-1014 No3¡ª56UNF 312-1081 312-1082 1/2¡ª20UNF
312-1015 312-1016 No4¡ª40UNC 312-1083 312-1084 1/2¡ª28UNEF
312-1017 312-1018 No4¡ª48UNF 312-1085 312-1086 1/2¡ª32UN
312-1019 312-1020 No5¡ª40UNC 312-1087 312-1088 9/16¡ª12UNC
312-1021 312-1022 No5¡ª44UNF 312-1089 312-1090 9/16¡ª16UN
312-1023 312-1024 No6¡ª32UNC 312-1091 312-1092 9/16¡ª18UNF
312-1025 312-1026 No6¡ª40UNF 312-1093 312-1094 9/16¡ª20UN
312-1027 312-1028 No8¡ª32UNC 312-1095 312-1096 9/16¡ª24UNEF
312-1029 312-1030 No8¡ª36UNF 312-1097 312-1098 9/16¡ª28UN
312-1031 312-1032 No10¡ª24UNC 312-1099 312-1100 9/16¡ª32UN
312-1033 312-1034 No10¡ª32UNF 312-1101 312-1102 5/8¡ª11UNC
312-1035 312-1036 No12¡ª24UNC 312-1103 312-1104 5/8¡ª12UN
312-1037 312-1038 No12¡ª28UNF 312-1105 312-1106 5/8¡ª16UN
312-1039 312-1040 No12¡ª32UNEF 312-1107 312-1108 5/8¡ª18UNF
312-1041 312-1042 1/4¡ª20UNC 312-1109 312-1110 5/8¡ª20UN
312-1043 312-1044 1/4¡ª28UNF 312-1111 312-1112 5/8¡ª24UNEF
312-1045 312-1046 1/4¡ª32UNEF 312-1113 312-1114 5/8¡ª28UN
312-1047 312-1048 5/16¡ª18UNC 312-1115 312-1116 5/8¡ª32UN
312-1049 312-1050 5/16¡ª20UN 312-1123 312-1124 11/16¡ª24UNEF
312-1051 312-1052 5/16¡ª24UNF 312-1125 312-1126 11/16¡ª28UN
312-1053 312-1054 5/16¡ª28UN 312-1127 312-1128 11/16¡ª32UN
312-1055 312-1056 5/16¡ª32UNEF 312-1129 312-1130 3/4¡ª10UNC
312-1057 312-1058 3/8¡ª16UNC 312-1131 312-1132 3/4¡ª12UN
312-1059 312-1060 3/8¡ª20UN 312-1133 312-1134 3/4¡ª16UNF
312-1061 312-1062 3/8¡ª24UNF 312-1135 312-1136 3/4¡ª20UNEF
312-1063 312-1064 3/8¡ª28UN 312-1137 312-1138 3/4¡ª28UN
312-1065 312-1066 3/8¡ª32UNEF 312-1139 312-1140 3/4¡ª32UN
312-1067 312-1068 7/16¡ª14UNC 312-1145 312-1146 13/16¡ª20UNEF
312-1069 312-1070 7/16¡ª16UN 312-1151 312-1152 7/8¡ª9UNC
312-1071 312-1072 7/16¡ª20UNF 312-1153 312-1154 7/8¡ª12UN
312-1073 312-1074 7/16¡ª28UNEF 312-1155 312-1156 7/8¡ª14UNF
312-1157 312-1158 7/8¡ª16UN 312-1253 312-1254 £±3/8¡ª8UN
312-1159 312-1160 7/8¡ª20UNEF 312-1255 312-1256 £±3/8¡ª12UNF
312-1161 312-1162 7/8¡ª28UN 312-1257 312-1258 £±3/8¡ª16UN
312-1163 312-1164 7/8¡ª32UN 312-1259 312-1260 £±3/8¡ª18UNEF
312-1169 312-1170 15/16¡ª20UNEF 312-1261 312-1262 £±3/8¡ª20UN
312-1175 312-1176 £±¡ª¡ª8UNC 312-1263 312-1264 £±3/8¡ª28UN
312-1177 312-1178 £±¡ª¡ª12UNF 312-1269 312-1270 £±7/16¡ª12UN
312-1179 312-1180 £±¡ª¡ª16UN 312-1273 312-1274 £±7/16¡ª18UNEF
312-1181 312-1182 £±¡ª¡ª20UNEF 312-1279 312-1280 £±1/2¡ª6UNC
312-1183 312-1184 £±¡ª¡ª28UN 312-1281 312-1282 £±1/2¡ª8UN
312-1185 312-1186 £±¡ª¡ª32UN 312-1283 312-1284 £±1/2¡ª12UNF
312-1193 312-1194 £±1/16¡ª18UNEF 312-1285 312-1286 £±1/2¡ª16UN
312-1195 312-1196 £±1/16¡ª20UN 312-1287 312-1288 £±1/2¡ª18UNEF
312-1199 312-1200 £±1/8¡ª7UNC 312-1289 312-1290 £±1/2¡ª20UN
312-1201 312-1202 £±1/8¡ª8UN 312-1291 312-1292 £±1/2¡ª28UN
312-1203 312-1204 £±1/8¡ª12UNF 312-1309 312-1310 £±5/8¡ª12UN
312-1205 312-1206 £±1/8¡ª16UN 312-1313 312-1314 £±5/8¡ª18UNEF
312-1207 312-1208 £±1/8¡ª18UNEF 312-1329 312-1330 £±3/4¡ª5UNC
312-1209 312-1210 £±1/8¡ª20UN 312-1331 312-1332 £±3/4¡ª6UN
312-1211 312-1212 £±1/8¡ª28UN 312-1333 312-1334 £±3/4¡ª8UN
312-1215 312-1216 £±3/16¡ª12UN 312-1335 312-1336 £±3/4¡ª12UN
312-1219 312-1220 £±3/16¡ª18UNEF 312-1337 312-1338 £±3/4¡ª16UN
312-1225 312-1226 £±1/4¡ª7UNC 312-1339 312-1340 £±3/4¡ª20UN
312-1227 312-1228 £±1/4¡ª8UN 312-1355 312-1356 £±7/8¡ª12UN
312-1229 312-1230 £±1/4¡ª12UNF 312-1377 312-1378 £²¡ª¡ª12UN
312-1231 312-1232 £±1/4¡ª16UN 312-1399 312-1400 £²1/4¡ª12UN
312-1233 312-1234 £±1/4¡ª18UNEF 312-1421 312-1422 £²1/2¡ª12UN
312-1235 312-1236 £±1/4¡ª20UN 312-1505 312-1506 £³1/2¡ª4UNC
312-1237 312-1238 £±1/4¡ª28UN 312-1507 312-1508 £³1/2¡ª6UN
312-1241 312-1242 £±5/16¡ª12UN 312-1509 312-1510 £³1/2¡ª8UN
312-1245 312-1246 £±5/16¡ª18UNEF 312-1511 312-1512 £³1/2¡ª12UN
312-1251 312-1252 £±3/8¡ª6UNC 312-1513 312-1514 £³1/2¡ª16UN