Flat Flange
3.27" Square Flat flange with 4 x .437" holes on 3.25" bolt circle for mounting on top of floor or bulkhead.
Tabbed Flange
3.27" Square Tabbed flange with 4 x .437" holes on 3.25" bolt circle for mounting below floor or bulkhead.
Round Flange
Eaton Round Series 5 flange with 4x .267" holes on 2.323" bolt circle.
Danfoss OSPM Mini
Danfoss Round OSPM Mini flange with 4x .260 holes on 2.2835" bolt circle.
Parker HGF
2.94" Square Parker HGF flange with 4x .347" holes on 3.25" bolt circle.