Product contents: Nuts / Spring washers / Flat washers Nominal size: M16 Pitch: 1.5 mm Width across flats: 24 mm Quantity: 5 Pcs Material: Carbon Steel (Black Oxide) Nut Strength Class: 12.9 Washer Strength Class: 8.8 Please note that the product picture is for reference purposes only and may not depict the exact item and size you are purchasing. If you have any questions, please do not hesitate to contact us at anytime. List of sizes available(Washer set from M6 to M56) M6 x 1.0 / M8 x 1.0 / M8 x 1.25 M10 x 1.0 / M10 x 1.25 / M10 x 1.5 M12 x 1.25 / M12 x 1.5 / M12 x 1.75 M14 x 1.5 / M14 x 2.0 / M16 x 1.5 M16 x 2.0 / M18 x 1.5 / M18 x 2.5 M20 x 1.5 / M20 x 2.5 / M22 x 1.5 M22 x 2.5 / M24 x 1.5 / M24 x 2.0 M24 x 3.0 / M27 x 1.5 / M27 x 2.0 M27 x 3.0 / M30 x 1.5 / M30 x 2.0 M30 x 3.5 / M33 x 2.0 / M33 x 3.5 M36 x 2.0 / M36 x 3.0 / M36 x 4.0