Qualfast: M4 Wing Nut A2 Manufactured from stainless steel to prevent rusting or where high temperatures are a consideration. MPN: M4 Wing Nut A2 Attributes: Box Quantity: 100 Driving Features: Wing Grade: 304 Leading Standard: DIN 314 Material: A2 Stainless Surface Treatment: Plain Thread: Metric Thread Direction: Right Thread Size: M4