Galvanized, forged carbon steel, heat treated, with alloy pins, permanently marked with Trade Size and Working Load Limit. For use in industrial Lifting, Towing and Tie-Down applications. Do not use screw pin shackles if the pin can roll under load and unscrew.
Murphy has multiple brands of galvanized screw pin anchor shackles to choose from.
USA - Columbus McKinnon, Crosby and Chicago Hardware.
Import - Chinese, Dutch (Green Pin)
Since Shackles come in a wide variety of styles and types & have tons of options available, choosing the correct shackle can be a bit tricky.