PART NO. THREAD TUBE O.D. DIMENSIONS E F D A B S1 S2 1QN4-12-02 M12X1.5 Z1/8"X27 6 24 17 11 14 1QN4-14-04 M14X1.5 Z1/4"X18 8 26 21 14 17 1QN4-16-06 M16X1.5 Z3/8"X18 10 27.5 24 16 19 1QN4-18-06 M18X1.5 Z3/8"X18 12 28 24 19 22 1QN4-22-08 M22X1.5 Z1/2"X14 14 30.5 29.5 22 27 1QN4-27-08 M27X1.5 Z1/2"X14 18 33 31 27 32 1QN4-27-12 M27X1.5 Z3/4"X14 18 33 35 27 32 1QN4-30-12 M30X1.5 Z3/4"X14 20 36.2 35.5 30 36 1QN4-36-16 M36X2 Z1"X11.5 25 41 39 36 41 1QN4-39-16 M39X2 Z1"X11.5 28 44.5 42.5 41 46 1QN4-42-20 M42X2 Z1.1/4"X11.5 32 47 42.5 41 50 1QN4-45-16 M45X2 Z1"X11.5 34 50 45 48 50 Note: In case if you are interested to order the adapter in complete set with sleeve and nut ,it is necessary to insert suffix "RN" after our part no.,for example 1QN4-18-06RN