M6 Zinc Plated Heavy Hexagon Nut - A194 Grade 7 These are tapped oversize. A special manufacture to go with hot dip galvanised bolts Quenched & tempered alloy steel heavy hex nuts Where: e = point to point m = thickness s = across flats d = Thread e - 11.05 mm (min) m - 4.7 mm (min) s - 10 mm (min) d - M6 Thread Pitch - 1.0 mm