PART NO. THREAD O-RING DIMENSIONS E F F A B L S1 1OT-04SP 7/16"X20 R1/4"X19 8.92X1.83 9.14 14.5 29.5 17 1OT-06SP 9/16"X18 R3/8"X19 11.89X1.98 9.93 15 30.5 19 1OT-06-04SP 9/16"X18 R1/4"X19 11.89X1.98 9.93 14.5 30 19 1OT-08SP 3/4"X16 R1/2"X14 16.36X2.21 11.13 20 38 22 1OT-12SP 1.1/16"X12 R3/4"X14 23.47X2.95 15.09 20 46 32 1OT-16SP 1.5/16"X12 R1"X11 29.74X2.95 15.09 25.5 51 38