Countersunk Torx Joist Screws For Insulation Fixing 8.0mm x 300mm Box of 25

• High performance 8.0mm x 300mm countersunk torx screw for fixing insulation to joists, roof decking, roofing boards and roofing batten.
• Heavy duty timber and deck Joist Screw replaces traditional coach screws or coach bolts.
• Torx, Reinforced Double Countersunk Head - Reduces cam out, increases torque transmission and assists countersinking
• Self- Countersinking Ribs – For improved countersinking and a flush finish
• Waxed Zinc and Yellow Passivated Finish – Corrosion resistant and significantly reduces torque.
• Milling Tread – Reduces torque, prevents splitting and torque.
• Serrated Thread - Cuts into wood reducing splitting and torque.
• Type 17 Cut Point – Reduces splitting and the requirement for pre-drilling.
• Each box comes complete with FREE torx bit.