EXCLUSIVE Otter Roofing & Cladding Timber Screws 14g x 50mm Pack of 250 Galvanised SKU: 231709 MODEL: TISG14507 Error. try again later You've successfully joined the club $ 103 pack of 250 Mitre 10 MSAvailable at Mitre 10 MEGA and selected Mitre 10 stores. Variants Suitable for outdoor use fixing to timber. Mechanical galvanising to class 3. Features and benefits Hex flanged head with EDPM washer. Self-drilling type 17 point. Split coarse thread used in roofing screws to secure roofing material to the screw head.