BSF 19-19-2 BSF 19-19-1/M20 BSF 19-19-1/14.5/NPT/S717 BSF 19-19-1/14.5/NPT BSF 19-19-1.5/14.5/NPT BSF 19-19-1 BSF 19-19-0.5/M20 BSF 19-19-0.5/M18/S830 BSF 19-19-0.5/M18 BSF 19-19-0.5/18.375/NPT