BKF 8-8-2 BKF 8-8-1/S717 BKF 8-8-1/M20 BKF 8-8-1/M18 BKF 8-8-1/14.5/NPT BKF 8-8-1.5/14.5/NPT/S717 BKF 8-8-1.5/14.5/NPT BKF 8-8-1 BKF 8-8-0.5/M20 BKF 8-8-0.5/M18