Steel Hex Nut, Zinc Yellow-Chromate Plated, Class 10, DIN 934, Metric, M20-2.5 Thread Size, 30 mm Width Across Flats, 16 mm Thick (Pack of 5): Amazon.com: Industrial & Scientific
Sechskantmuttern Feingewinde DIN 934 Muttern von M6 bis M20 Stahl Verzinkt (1, M6x0,75) : Amazon.de: Baumarkt
Amazon.com: M6-M48 Black Color Carbon Steel Hex Nuts Grade 8.8 DIN 934 Metric Big Hex Nut M48 M45 M42 M39 M36 M33 M30 M27 M24 M22 M20 M18 M1 (Size : M30