EXCLUSIVE Otter Roofing & Cladding Timber Screws 12g x 30mm Pack of 10 Galvanised SKU: 231687 MODEL: TING1230P Error. try again later You've successfully joined the club $ 5 .98 pack of 10 Mitre 10 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. Coarse thread for use in lighter density materials.