A chrome-plated book screw designed as a compact piece of dive hardware for securing accessories on a harness or backplate setup. This harness screw works as a reliable dive harness bolt, helping keep connected parts firmly in place during underwater use and regular sports gear setup. Made from brass with a bright chrome-plated surface, it offers a clean look while supporting performance in wet environments. The integrated O-sealing ring helps improve the connection at the joint, adding extra stability and a tighter fit for book screw assembly. Available in 15 mm, 21 mm, and 27 mm versions, giving divers more flexibility to match different mounting needs and equipment thickness.
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