3a thread class 18 thread quantity per inch outer member o.d. 2.650 in. nom.; bore center to shank end distance 3.06 in.; shank end to shoulder length 1.125 in.; inner member width 1.145 in. min., 1.150 in. max.; outer member width 1.00 in. min., 1.05 in. max.; bore dia. 1.2495 in. min., 1.2500 in. max.; used on 6615002321544lh actuator of C5a shouldered ball type unjef thread series