100pcs) DIN 6926 M12 Self-Locking Hexagon Flange Nuts with Serration A4 Stainless Steel, Ships Free in USA by Aspen Fasteners, ASSP6926412: Amazon.com: Industrial & Scientific
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Amazon.com: Type 1 All-Metal Hexagon Lock nut, 304 Stainless Steel GB6184 Insert-Type locknut, high Temperature Resistance-[304 Stainless Steel] M10 : Industrial & Scientific
PD® Kunststoff Flügelmuttern M4 (DIN 315) | Hochwertige PA Nylon Flügelmutter | Plastik Muttern Schmetterlingsmuttern zur universellen Nutzung | 5 Stück : Amazon.de: Baumarkt