Used on f-111 blankers; mx-10189. 3a 2nd end thread class 12 2nd end thread quantity per inch anodize surface treated rigid w/offset wrenching facility unj 2nd end thread series
3a 2nd end thread class 12 all ends thread quantity per inch drilled for lockwire on first end anodize surface treated plain unj all ends thread series
3a 2nd end thread class 20 1st end thread quantity per inch passivate surface treated threaded external rigid, threaded internal swivel unjf 2nd end thread series