BKF 14-755-1 BKF 14-755-1/M18/S653 BKF 14-755-2/S717/CS10321 BKF 14-755-5/M18/S653 BKF 14-836-1/M18/S717 BKF 19 BKF 19-19-0.3 BKF 19-19-0.5 BKF 19-19-0.5/14.5/NPT BKF 19-19-0.5/18.375/NPT