High Collar Spring lock washer with square ends
Zincplated finish
Outside diameter = 21.1mm
Material thickness = 3.0mm
DIN 7980 defines high-collar, split-ring spring lock washers designed for metric cylinder head (socket head) screws.
These hardened steel or stainless-steel washers create a secure, vibration-resistant connection by acting as a spring between the bolt head and the assembly, often used for M3 to M48 screw sizes.
