Amazon.co.jp: Hex Nuts, DIN 934A2-70 Stainless Steel Corrosion Resistant Screw Nuts Assortment Kit High Strength for Industrial Machinery (M3) : Industrial & Scientific
Amazon.com: Steel Hex Nut, Plain Finish, Class 10, DIN 934, Metric, M20-2.5 Thread Size, 30 mm Width Across Flats, 16 mm Thick (Pack of 25) : Industrial & Scientific