M6 (⌀6mm) DÜNNSTAU HALB SICHERUNGSMUTTERN A2 Edelstahl Sechskant DIN 439
A2 Stainless Steel Half Nuts. Manufactured from A2 stainless steel for improved corrosion resistance. Also known as lock nuts and thin nuts. Half nuts are often used on top of a standard full nut to lock it in place.