Roofing Bolts with Square Nuts - Zinc M8 x 50 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 Ø (mm) M8 MOQ Increment 1 Nut Type Square MOQ 1 Nut Size (mm) M8 Thread Type Metric Corrosion Rating (1-5) 1 - Clean, dry & low humidity environments Included Items M8 Square Nuts Thread L (mm) 50 Recess Type Cross Point Type B Point Nut Socket Size (mm) 13 Pack Type Box Finish Zinc Substrates Hardwood, Softwood, Plastic, Steel, Thin Sheet Metal Material Carbon Steel Head Type Dome Head Ø (mm) 19 Thread Coverage Fully Threaded