The Roofing Bolt and Nut M6 x 30mm Dia Zinc Plated is manufactured from steel, having high strength, low weight, durability and ductility. It has high strength to weight ratio which means high strength per unit mass. This is used in outdoor projects and oak timber projects. Its low rusting property makes it suitable for use in moist areas. It is used in timber to timber and timber to metal construction as these bolts incorporate a square neck for grip. The M6 threading, a cross-slotted mushroom

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