Buildex Hex Head Timber Screws 10G x 25mm Climaseal SKU: 194792 MODEL: X701232 Error. try again later You've successfully joined the club $ 19 .47 pack of 50 Available on orders $50 to $1500. More info × Mitre 10 MAvailable at Mitre 10 MEGA stores. Variants These self drill Type 17 Screws are of a superior trade quality, designed for use in timber and are suitable for external applications. These screws have hex heads. Features and benefits General purpose Type 17 external timber screws. Hex head. Part thread.