Trailer Bunk Galvanized Swivel Brackets Hot-Dipped Galvanized Swivel Top Bunk Brackets are common on smaller boat trailers that require not only height adjustment of the bunk boards but also angle adjustment to accommodate the boat hull design. These trailer bunk swivel brackets are hot-dipped galvanized for maximum corrosion resistance. To complete their installation, you will also need lag screws to reinstall the new bunk board brackets and bunk boards. Also be aware that these swivel bunk bra