This pack includes 6pcs screws and 6pcs nuts,perfect replacement kit for mounting accessories in the track system on kayaks and boats. Features: 6 nylon-covered stainless steel screws with 6 nuts. Use these nuts to secure your item to tracks(not included) for easy mobility. For kayak track rail mounting systems. Can be used for spare or replacement nuts and screws. Accessories for kayak,boat,canoe,etc. Specification: Material: Stainless steel + Nylon Nut Hole: M6 Screw Size: 33 * 7 * 35 mm / 1.2* 0.3* 1.4 in Screw Weight: 9.6 g / 0.3 oz Nut Size: 27 * 11 * 3 mm / 1 * 0.4 * 0.1 in Nut Weight: 7.6 g / 0.3 oz Package weight: Approx. 103.9 g / 3.7 oz Package List: 6* Kayak Rail Screw 6* Nut