300pcs) DIN 6926 M6 Self-Locking Hexagon Flange Nuts with Serration A4 Stainless Steel, Ships Free in USA by Aspen Fasteners, ASSP692646: Amazon.com: Industrial & Scientific
M6 Selbstsichernde Muttern (Stück25) Stahl Sechskant Stoppmuttern Klemmmuttern Muttern Selbstsichernde DIN 985 ISO 10511 (6mm Ø) : Amazon.de: Baumarkt