PART NO. THREAD TUBE O.D. DIMENSIONS E F G D1,D2 A B C S1 S2,S3 AQHQ-14-04-14 M14X1.5 Z1/4"X18 M14X1.5 8 28 25.5 28 14 17 AQHQ-16-06-16 M16X1.5 Z3/8"X18 M16X1.5 10 34 31 34 19 19 AQHQ-18-06-18 M18X1.5 Z3/8"X18 M18X1.5 12 34 31 34 19 22 AQHQ-22-08-22 M22X1.5 Z1/2"X14 M22X1.5 14 37.7 36.7 37.7 22 27 AQHQ-27-12-27 M27X1.5 Z3/4"X14 M27X1.5 18 42 44 42 27 32 AQHQ-36-16-36 M36X2 Z1"X11.5 M36X2 25 48 48 48 36 41 AQHQ-42-20-42 M42X2 Z1.1/4"X11.5 M42X2 32 57 60 57 41 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 AQNQ-18-06-18RN.