Hilitchi 510Pcs M4 / 5/6 Stainless Steel Phillips Pan Head Bolts Screws Nuts Flat and Lock Washers Assortment Kit (Phillips Pan Head) High Quality 304 Stainless Steel Screw Nut Washers Assortment Kit. Products include: Phillips Pan Head Bolts Screws, Nuts, Flat and Lock Washers. Different Size of M4, M5 and M6. Package Quantity: 510Pcs, With Plastic Box. Material: 304 Stainless Steel (Not 201 Stainless Steel).