3a 2nd end thread class 12 1st end thread quantity per inch machined groove in flared end to accommodate seal ring per KC103 passivate outside surface treated un 1st end thread series
3a all ends thread class 3.861" overall length 12 first quick disconnect end thread quantity per inch used on grumman aircraft, model A10 anodize surface treated male coupling half un all ends thread series
3a 2nd end thread class 12 1st end thread quantity per inch machined groove in flared end to accommodate seal ring per KC103 passivate outside surface treated un 1st end thread series