Roofing Bolts with Square Nuts - Zinc M8 x 60 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. Substrates Hardwood, Softwood, Plastic, Steel, Thin Sheet Metal MOQ Increment 1 Thread L (mm) 60 Material Carbon Steel Nut Type Square MOQ 1 Thread Type Metric Corrosion Rating (1-5) 1 - Clean, dry & low humidity environments Thread Ø (mm) M8 Size (mm) M8 x 60 Nut Size (mm) M8 Head Ø (mm) 19 Nut Socket Size (mm) 13 Recess Type Cross Point Type B Point Finish Zinc Included Items M8 Square Nuts Head Type Dome Thread Coverage Fully Threaded