Bottom transom pintle, 5/16" (8mm) pintle, 4-hole mounting, 5mm diameter mounting holes. Width (across) 3" (76mm), Depth 1" (25mm), Height 1-1/8" (28mmm), Overall height (including pintle) 2-7/8" (73mm), Mounting holes across 2.18" (55.5mm), Mounting holes top/bottom 5/8" (16mm)