BKFDV 8-8-0.5/M18 BKFDV 8-8-0.5/M18/S1244 BKFDV 8-8-3/M18/S1244 BK-FHL17G1 BK-FHN31G1 BK-FHN42W BK-FHN55W BKFK 12-12-0.5/14.5/NPT BKFK 19-19-0.5/14.5/NPT BKFK-CC