EXCLUSIVE Otter Roofing & Cladding Timber Screws 12g x 50mm Pack of 8 Galvanised SKU: 231704 MODEL: TISG1250P Error. try again later You've successfully joined the club $ 5 .98 pack of 8 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. Split coarse thread used in roofing screws to secure roofing material to the screw head.