BSF 7-7-0.5/M20 BSF 7-7-0.5/M18 BSF 7-7-0.5/18.375/NPT BSF 7-7-0.5/14.5/NPT BSF 7-7-0.5 BSF 6-6-1/14.5/NPT BSF 6-6-1 BSF 6-6-0.5/M20 BSF 6-6-0.5/M18 BSF 6-6-0.5/18.375/NPT