The K2 Systems Hex Head Screw DR #14 × 3″ × 5/16 (Part #4000310) is a specialized self-tapping fastener designed for solar mounting applications, particularly with K2 roof attachment products like the Splice Foot XL. This screw features a hex head and an integrated EPDM sealing washer to help prevent water ingress when installed through roof attachments into either rafter or decking. It’s engineered to provide strong pull-out resistance and secure fastening in wood substrates, enabling reliable structural connection points for solar panel rails and mounts. Key features: Self-tapping design with seal washer — eliminates the need for pre-drilling in many cases. Compatible with multiple K2 roof attachments (e.g., Splice Foot XL). Hex head for easy drive with standard tools. Provides enhanced pull-out strength when used as intended.
