3a all ends thread class w/mtg flange on rigid end, two mtg holes 0.191 in. dia, 2.060 in. apart, flange 0.120 in. thk single joint, double elbow design unf all ends thread series
Used on helicopter, utility-tactical transport uh-1 and eh-1 (bell). 3a 2nd end thread class 12 1st end thread quantity per inch anodize surface treated unj 1st end thread series