Designed to attach sheet metal (max 0.8mm) to timber. Once installed the EPDM washer prevents water ingress. Exterior plating gives a reliable and durable corrosion resistant coating which resists over 1,000 hours salt-spray. Exterior plating gives a reliable and durable corrosion resistant coating which resists 1,000 hours salt-spray Single slash point to reduce torque and the risk of timber splitting at low edge distance" Thread Dia. mm: 6.3 Length mm: 45 Thread Length mm: N/A Thread Type: 60 Single Deep Head Type: Hex Head Dia. mm: N/A Finish: Exterior (Silver Organic) Material: Case & Core Hardened Carbon SteelSize 6.3 x 45 - 90 Pieces Timco Slash Point Screws - Hex - For Timber - Exterior - Silver - With EPDM