M24 Hex Nut - A2 Grade A2 stainless steel has good resistance to corrosion except in severe industrial and Marine Condition. Use A4 in a marine environment. Where: e = point to point m = thickness s = across flats d = Thread Thread Pitch - 3.0 mm e - 39.55 mm (min) m - 17.7 mm (min) s - 36 mm d - M24 DIN934