PART NO. THREAD O-RING DIMENSIONS E F F A B S1 S2 1BO4-02-04OG G/18"X28 7/16"X20 8.92X1.83 17 24 11 17 1BO4-02-05OG G/18"X28 1/2"X20 10.52X1.83 17 26 14 17 1BO4-04OG G1/4"X19 7/16"X20 8.92X1.83 22 26 14 17 1BO4-04-05OG G1/4"X19 1/2"X20 10.52X1.83 22 26 14 17 1BO4-04-06OG G1/4"X19 9/16"X18 11.89X1.98 22 27.5 14 19 1BO4-04-08OG G1/4"X19 3/4"X16 16.36X2.21 22 31.5 19 24 1BO4-06-04OG G3/8"X19 7/16"X20 8.92X1.83 21 28 16 17 1BO4-06OG G3/8"X19 9/16"X18 11.89X1.98 22 28 16 19 1BO4-06-08OG G3/8"X19 3/4"X16 16.36X2.21 23 31.5 19 24 1BO4-06-10OG G3/8"X19 7/8"X14 19.18X2.46 24 38.5 22 27 1BO4-08OG G1/2"X14 3/4"X16 16.36X2.21 27 33 22 24 1BO4-08-10OG G1/2"X14 7/8"X14 19.18X2.46 27 38.5 22 27 1BO4-08-12OG G1/2"X14 1.1/16"X12 23.47X2.95 28.5 43.5 27 32 1BO4-12-08OG G3/4"X14 3/4"X16 16.36X2.21 32 38.6 27 24 1BO4-12OG G3/4"X14 1.1/16"X12 23.47X2.95 32 43.9 27 32 1BO4-12-10OG G3/4"X14 7/8"X14 19.18X2.46 32 42 27 27 1BO4-12-16OG G3/4"X14 1.5/16"X12 29.74X2.95 32.5 45.5 33 41 1BO4-16OG G1"X11 1.5/16"X12 29.74X2.95 34 45.5 33 41 1BO4-16-12OG G1"X11 1.1/16"X12 23.47X2.95 34 45 33 32 1BO4-16-20OG G1"X11 1.5/8"X12 37.46X3.00 38.5 48.5 41 50 1BO4-20OG G1.1/4"X11 1.5/8"X12 37.46X3.00 38.5 48.5 41 50 1BO4-20-16OG G1.1/4"X11 1.5/16"X12 29.74X2.95 38.5 48.5 41 41 1BO4-20-24OG G1.1/4"X11 1.7/8"X12 43.69X3.00 41.5 50 48 55 1BO4-24OG G1.1/2"X11 1.7/8"X12 43.69X3.00 44 50 48 55