18.04 B Top Rudder Gudgeon for 1.5" (38mm) wide rudders. Carbon Bushing, 2-hole mounting. Inside depth 2-1/4" (57mm), Overall length 3-1/4" (82mm), Height 3/4" (19mm), Pin diameter 5/16" (8mm), C/C fasteners 1.5" (38mm) 5mm fasteners size