Features:
1.It is made of 304 stainless steel, which provides good corrosion resistance, ensuring a long service life.
2.Serrated lock washers offer increased reliability and performance compared to standard shake resistant washers.
3.External overlapping teeth grip both surfaces while clenched, creating, friction. that prevents the nut from loosening.

Specification:
Product Name: M12 External Tooth Star Lock Washers
Main Color: Silver Tone
Outer Diameter: 20.5mm / 0.8''
Thickness: 1mm / 0.039''
Inner Diameter: M12 / 0.47''

Package Contents:
40Pcs x M12 External Tooth Star Lock Washers