D (mm) D(inch) Thread Part No. 38 1-1\2 R25 S38-25B 42 1-21/32 R25 S42-25B 45 1-3\4 R25 S45-25B 48 1-7\8 R32 S48-32B 51 2 R32 S51-32B 55 2-5\32 R32 S55-32B 57 2-1\4 R32 S57-32B 60 2-23\64 R32 S60-32B 64 2-1\2 R32,R38 S64-32B，38B 70 2-3\4 R32,R38 S70-32B，38B 76 3 R38,T38 S76-38B，38T 80 3-5\32 R38,T38 S80-38B，38T 85 3-11\32 T38,T45 S85-38T，45T 89 3-1\2 T38,T45 S89-38T，45T 102 4 T38,T45,T51 S102-38T，45T，51T