JP20 Series Mounting Flange Option Shaft End Options JP20 Series - Mounting Flange Options It has various mounting flanges of various international standards and special specifications to meet the customer’s various usage conditions.F22 and F28 on the option list are casting iron. JP20 SERIES GEAR PUMP FRONT COVER CODE F21 SAE 'A-A' FLANGE JP20 SERIES GEAR PUMP FRONT COVER CODE F22 SAE 'A-A' FLANGE JP20 SERIES GEAR PUMP FRONT COVER CODE F23 4 BOLT FLANGE #1 JP20 SERIES GEAR PUMP FRONT COVER CODE F24 4 BOLT FLANGE #2 JP20 SERIES GEAR PUMP FRONT COVER CODE F25 SQUARE FLANGE JP20 SERIES GEAR PUMP FRONT COVER CODE F26 ITALIAN TYPE FLANGE JP20 SERIES GEAR PUMP FRONT COVER CODE F26-1 GERMAN FLANGE JP20 SERIES GEAR PUMP FRONT COVER CODE F26-2 REXROTH FLANGE JP20 SERIES GEAR PUMP FRONT COVER CODE F27 GERMAN TYPE FLANGE JP20 SERIES GEAR PUMP FRONT COVER CODE F28 PERKINS-1000 FLANGE