UNF Thread gauges plug and ring UNF American unified fine thread UNF, ANSI B-1.1 600 P Gauge dimensions ANSI/ASME B1.2 Symbol MSBg MSBg MSRh MSRk Typ GO / NOGO GO / NOGO GO NOGO Tolerance Tol 2B 3B 2A 2A UNF Ć d1 1”/P INDEX S3-302186 S3-302187 Y3-412182 Y3-422182 No 5 - 44 3,175 44 4205 No 6 - 40 3,505 40 4206 No 8 - 36 4,166 36 4208 No 10 - 32 4,826 32 4210 No 12 - 28 5,486 28 4212 1/4 - 28 6,350 28 4227 5/16 - 24 7,938 24 4228 3/8 - 24 9,525 24 4229 7/16 - 20 11,112 20 4230 6 1/2 - 209/16 - 185/8 - 1812,70014,28815,87520 4231184232184233 3/4 - 16 19,050 16 4235 8 7/8 - 141 - 12 22,22525,400 14 4237124239 1.1/8 - 12 28,575 12 4241 1.1/4 - 12 31,750 12 4243 1.3/8 - 12 34,925 12 4245 1.1/2 - 12 38,100 12 4247 i GO gauges above 1 ¾” - UNC are called MSCh and NO GO MSCk and they are produced with separate handle Example of order Available from stock 222 Y3-422182-4235 On request MSRk 3/4-16 UNF-2A