PART NO. THREAD TUBE O.D. DIMENSIONS E F D1,D2 A B L S1 S2 S3,S4 6Q-10 M10X1 M10X1 5 12.5 34 52.5 14 14 14 6Q-12 M12X1.5 M12X1.5 6 15.7 38 59.7 17 17 14 6Q-14 M14X1.5 M14X1.5 8 17 40 63 17 19 17 6Q-16 M16X1.5 M16X1.5 10 18 41 65 19 22 19 6Q-18 M18X1.5 M18X1.5 12 18 43 69 24 24 22 6Q-22 M22X1.5 M22X1.5 14 19.5 44 73.5 27 27 27 6Q-24 M24X1.5 M24X1.5 16 20 45 75 27 30 30 6Q-27 M27X1.5 M27X1.5 18 20 48 78 30 32 32 6Q-30 M30X1.5 M30X1.5 20 23 53 87 34 36 36 6Q-33 M33X2 M33X2 22 26 55 92 36 41 41 6Q-36 M36X2 M36X2 25 25 56 94 41 41 41 6Q-39 M39X2 M39X2 28 26 58 97 41 46 46 6Q-42 M42X2 M42X2 32 28.5 59 102.5 50 50 50 6Q-45 M45X2 M45X2 34 28.5 60 103.5 50 50 50 Note: In case if you are interested to order the adapter with lock nut,please insert suffix "LN" after for example 6Q-30LN order the adapter with sleeve and nut,insert suffix "RN"; after part no.,for example 6Q-30RN order the adapter with lock nut and sleeve and nut,insert suffix "LN/RN" after part no.,for example 6Q-30LN/RN.