Used on 2320-01-230-0307. 2a 1st end thread class connector male 37deg flared end shall be iaw sae J514, 5/8 nom tube od, male straight thread end shall be iaw iso 9974-3 s series, M20 thread. material iaw astm A108. center of body 1.06 max hex. zinc surface treated m 2nd end thread series