A range of hexagon head coach screws, in bright zinc plated steel, galvanised steel, A2 (304)stainless steel and A4 (316) marine grade stainless steel. Coach screws are heavy duty wood screws that have a hexagon head, so that they can withstand much higher insertion torque. Coach screws are commonly used in the construction industry, and are designed for fastening metal to timber or heavy duty timber to timber applications. Coach screws are also commonly known as lag screws or lag bolts. Our range overs diameters M6 to M20 and lengths of 25mm to 300mm.