Flange Nut without Locking Toothing According to DIN 6923 / A2 Stainless Steel V2A / Hexagonal Nut with Flange without Locking Toothing, Collar Nut (Pack of 50, M4) : Amazon.de: DIY & Tools
PROTECH 5 Stück Sechskantmuttern M8 Edelstahl Mutter Halbe Niedrig Sechskant Muttern DIN 439 V2 A2 : Amazon.de: Baumarkt