M3 X 9mm Lock Washer Internal Locking Washer Star Tooth Black 100pcs-Good

Size - m3; Outside diameter: 9mm

Material - made of 65mn spring steel with black oxide finish, corrosion resistant and durable

Easy to install - product thickness is relatively thin, please be careful when installing installation and don't use too much force

[features] - locking washers exert a spring force between the fastener head and the substrate to create more friction and resistance to rotation .

Application - widely used for maintenance of vehicles, wheels and other products.