M12 x 1.75 Coarse Thread DIN 985 Class 10 Nyloc (Nylon Insert Locknut) Standard Medium Carbon Steel Zinc Plated Pk 50: Amazon.com: Industrial & Scientific
SECCARO Sicherungsmutter M3, Edelstahl V2A VA A2, DIN 985 / ISO 10511, Sechskant, 20 Stück : Amazon.de: Baumarkt