DIN6798 There are many sharp elastic teeth on the circumference, and the spines are pressed on the supporting surface to prevent the fasteners from coming loose.The elastic washer with inner teeth is used under the screw head with small head size.The elastic washer with outer teeth is mostly used under bolt head and nut.The elastic washer with teeth is smaller than the ordinary spring washer, and the fasteners are under uniform stress and reliable to prevent looseness, but not suitable for common disassembly.
