Used on 2320-01-442-1940, truck, cbt, (command bridge transporter). 2a all ends thread class 12 2nd end thread quantity per inch phosphate surface treated un 2nd end thread series
3a 2nd end thread class 12 2nd end thread quantity per inch FLANGE0.060 in thk, 1.900 in id, 2.500 od, 6 mounting holes 0.125 in hole dia nickel surface treated unj 2nd end thread series
Used on aircraft, f-15 & f-16. 3a 2nd end thread class 20 2nd end thread quantity per inch weapon system essential passivate surface treated unjs 1st end thread series