Roofing Bolts with Square Nuts - Zinc M6 x 25 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 Finish Zinc Point Type B Point Thread L (mm) 25 Head Type Dome Nut Size (mm) M6 Material Carbon Steel Corrosion Rating (1-5) 1 - Clean, dry & low humidity environments Thread Type Metric MOQ Increment 1 MOQ 1 Recess Type Cross Head Ø (mm) 14 Nut Socket Size (mm) 11 Nut Type Square Thread Ø (mm) M6 Included Items M6 Square Nuts Brand TIMCO Thread Coverage Fully Threaded