PART NO. THREAD DIMENSIONS E F A B S1 S2 S3 3J9-04 7/16"X20 7/16"X20 9 9 11 15 15 3J9-05 1/2"X20 1/2"X20 9.5 9.5 14 17 17 3J9-06 9/16"X18 9/16"X18 10.5 10.5 14 19 19 3J9-08 3/4"X16 3/4"X16 11 11 19 24 24 3J9-10 7/8"X14 7/8"X14 13 13 22 27 27 3J9-12 1.1/16"X12 1.1/16"X12 15 15 27 32 32 3J9-16 1.1/16"X12 1.5/16"X12 16 16 33 41 41