M12 Self Colour Heavy Hexagon Nut - A194 Grade 7 Quenched & tempered alloy steel heavy hex nuts Where: e = point to point m = thickness s = across flats d = Thread e - 21.10 mm (min) m - 11.57 mm (min) s - 18.67 mm (min) d - M12 Thread Pitch - 1.75 mm