BKF 5-5-0.5/18.375/NPT BKF 5-5-0.5/M18 BKF 5-5-0.5/M20 BKF 5-5-1 BKF 5-5-1/14.5/NPT BKF 5-5-1/M18 BKF 5-5-1/M20 BKF 5-5-2 BKF 6-6-0.5 BKF 6-6-0.5/14.5/NPT