This cast aluminum component is a mast or boom end plug / cap (often used as a boom end fitting or a mast-base/masthead insert) designed to match a specific teardrop or oval hollow aluminum extrusion profile.
This cast aluminum component is a mast or boom end plug / cap (often used as a boom end fitting or a mast-base/masthead insert) designed to match a specific teardrop or oval hollow aluminum extrusion profile.