M4.5 x 40 Green Decking Screw (200/Box)

M4.5 x 40 Green Decking Screws for reliable board-to-joist fixing in hardwood, softwood, and treated timbers. Each screw is manufactured from Ruspert-coated steel, featuring a durable three-layer metallic coating of zinc, film, and ceramic. This advanced finish offers excellent corrosion resistance and a subtle, low-visibility appearance that complements the colour of treated softwood decking and garden structures.The countersunk head draws boards tight for a flush, professional finish with reduced movement and creak. A sharp, coarse thread provides fast bite, controlled driving, and dependable pull-down across typical decking substrates.Suitable for fixing thin boards, edging, and narrow components into joists.