There has been 3 version to Hunter 170 Rudder Gudgeon Bracket, the one we are currently offering has the same 6 mounting screw holes, but the bracket is thicker instead of stainless strap at the top of the Gudgeon Bracket.
It is shown in the picture labeled as newer gudgeon bracket.
Please check to make sure the part you're replacing looks like the one in the photo. There may be small differences due to manufacturer upgrades and redesigns.