The Seasure Rudder gudgeons come with an 8mm hole and 3 hole fixings on each side of the straps. All Seasure rudder fittings have 5mm fixing holes and have 3 options of internal diameter: 25mm, 38mm & 54mm
The Seasure transom fittings only work with other Seasure fittings as the diameter of the pins & holes are different to that of other manufacturers. The gudgeons are available with and without bushes. A bush is the preferred choice as once it is worn out you can replace just the bush (18.39) and not the complete fitting.