FSB 4-1/14.5/NPT FSB 4-1/14.5 FSB 4-0.9/14.5 FSB 4-0.5/18.25/S727 FSB 4-0.5/18.25/S690 FSB 4-0.5/18.25/S621 FSB 4-0.5/18.25 FSB 4-0.5/14.5/NPT FSB 4-0.5/14.5 FSB 4-0.3/18.25