Roofing Bolts with Square Nuts - Zinc M6 x 80 Manufactured with a large flat head, which distributes the load across the fixing to increase the clamping effectiveness. Making it ideal for clamping thin sheet metal, plastic and wood. Thread L (mm) 80 Thread Ø (mm) M6 Point Type B Point Finish Zinc Substrates Hardwood, Softwood, Plastic, Steel, Thin Sheet Metal Included Items M6 Square Nuts Nut Socket Size (mm) 11 Head Type Dome Nut Size (mm) M6 Material Carbon Steel Head Ø (mm) 14 Corrosion Rating (1-5) 1 - Clean, dry & low humidity environments MOQ Increment 1 Thread Type Metric Recess Type Cross MOQ 1 Nut Type Square Thread Coverage Fully Threaded