Accommodate or place any accessory into any track system on kayaks with this universal track nut and Screw kit. Features 304 stainless steel construction, almost universal installation, it is a perfect replacement kit for mounting accessories in the track system on kayaks, boats. Features: 304 stainless steel construction, rust and corrosion resistant. Nut size: 29 * 13 * 3mm (1.14 * 0.51 * 0.12in). Almost universally fits any track system on boats. Mount any kayak accessories with this kit. Easy installations with M6 screwdrivers (not included). Perfect kayak mounting hardware replacement kit for kayakers. Specifications: Material: 304 stainless steel Model: M6 Screw size: 6 * 24.5mm / 0.24 * 0.96in Thread length: 20mm / 0.79in Nut size: 29 * 13 * 3mm / 1.14 * 0.51 * 0.12in Package size: 12.5 * 8 * 1cm / 4.9 * 3.1 * 0.4in Package weight: 53g / 1.9oz Package List: 4 * Screw 4 * Track Nut