Timco Hex Head Index Screws - A4 Stainless Steel - Heavy-Duty Timber Fixings for Outdoor Projects. Engineered for superior timber-to-timber fastening, Timco Hex Head Index Screws are the ideal choice for outdoor landscaping, decking, fencing, and sleeper installations. Designed as a modern alternative to traditional coach screws, these heavy-duty screws deliver exceptional holding power and are built to withstand the elements, Manufactured from A4 Stainless Steel for ultimate corrosion resistance making it ideal for external applications. Whether working with hardwood, softwood, or treated timber, these screws provide long-lasting, reliable results. Each screw features a fixed washer and deep single thread, reducing the risk of timber splitting while improving drive-in speed and enhancing pull-out resistance. Perfect for both professionals and DIY enthusiasts, Timco Hex Head Index Screws offer a premium fastening solution that combines strength, durability, and ease of use for all your timber projects.