PART NO. THREAD O-RING DIMENSIONS E F F A B L S1 S2 6JO-04 7/16"X20 7/16"X20 8.92X1.83 32.5 9.1 47.5 14 17 6JO-06 9/16"X18 9/16"X18 11.89X1.98 32.5 9.9 48.5 17 22 6JO-08 3/4"X16 3/4"X16 16.36X2.21 36.5 11.1 55.5 22 24 6JO-10 7/8"X14 7/8"X14 19.18X2.46 40 12.7 62.5 27 30 6JO-12 1.1/16"X12 1.1/16"X12 23.47X2.95 44.5 15.1 70.5 32 36 6JO-16 1.5/16"X12 1.5/16"X12 29.74X2.95 44.5 15.1 70.5 38 41 Note: In case if you are interested to order the adapter with lock nut,please insert suffix "LN" after our part no for example 6JO-12LN. Nut and sleeve should be ordered separately .The nut NB200 and sleeve NB500 is suitable for metric tube,the nut NB200 and sleeve NB300 is suitable for inch tube.