Quick-Change Tap Adapters RC-Style Solid Tap Adapters (RC-Style Solid Tap Adapters continued) RC Solid Tap Adapter • Inch/Metric ANSI RC1 RC2 RC3 D = .750 D = 1.220 D = 1.890 tap size D2 = 1.180 D2 = 1.890 D2 = 2.760L = 1.100L = 1.810L = 2.760 mm in L1 = .280 L1 = .430 L1 = .550 D1 S10 M3 & M3.18 & M3.5 #0 - #6 UNC/UNF T11006 — — .141 .110 M4 #8 UNC/UNF T11007 — — .168 .131 M4.5 & M5 #10 UNC/UNF T11008 — — .194 .152 — #12 UNC/UNF T11009 — — .220 .165 M6 & M6.3 1/4 UNC/UNF T11010 — — .255 .191 — — T110166 — — .313 .234 M7 & M8 5/16 UNC/UNF T11012 T21018 — .318 .238 — 7/16 UNC/UNF T11014 T21020 — .323 .242 M12 & M12.5 1/2 UNC/UNF T11015 T21021 — .367 .275 M10 3/8 UNC/UNF T11013 T21019 — .381 .286 M14 9/16 UNC/UNF T110155 T21022 — .429 .322 — — T110177 — .438 .328 M16 5/8 UNC/UNF — T21023 — .480 .360 M18 11/16 UNC/UNF — T21024 — .542 .406 — — — T210288 — .563 .421 — 3/4 UNC/UNF — T21025 — .590 .442 M20 13/16 UNC/UNF — T21026 T31031 .652 .489 — — — T210300 T310387 .688 .515 M22 7/8 UNC/UNF — T21027 T31032 .697 .523 — — — T210299 .700 .531 M24 15/16 UNC/UNF — — T31033 .760 .570 M25 1 UNC/UNF — — T31034 .800 .600 M27 1 1/8 UNC/UNF — — T31035 .896 .672 — — — — T310388 .906 .679 — 1 1/4 UNC/UNF — — T31036 1.021 .766 M30 1 3/8 UNC/UNF — — T31037 1.108 .831 — — — — T310389 1.125 .843 I80 WWW.WIDIA.COM Quick-Change Tap Adapters