500pcs) DIN 6926 M6 Self-Locking Hexagon Flange Nuts with Serration A2 Stainless Steel, Ships Free in USA by Aspen Fasteners, ASSP692626: Amazon.com: Industrial & Scientific
Sechskantmutter M6 selbstsichernd DIN 985 Edelstahl A2 (1 Stück) - Sicherungsmutter Stopmutter Klemmmutter Mutter V2A : Amazon.de: Baumarkt