PART NO. THREAD O-RING DIMENSIONS E F E A B L S1 S2 2FJ-04 9/16X18 7/16"X20 7.65X1.78 10 9 24 17 17 2FJ-06 11/16"X16 9/16"X18 9.25X1.78 11.2 10.5 26 19 19 2FJ-08 13/16"X16 3/4"X16 12.42X1.78 13 10.5 31.5 22 24 2FJ-10 1"X14 7/8"X14 15.6X1.78 15.5 12 36.5 27 27 2FJ-12 1.3/16"X12 1.1/16"X12 18.77X1.78 17 15 40.5 32 32 2FJ-16 1.7/16"X12 1.5/16"X12 23.52X1.78 17.5 16 41 38 41