Washer Type:: M4 Internal Star Washer
Outer Dia: 7.5mm/0.3"
Thickness: 0.5mm/0.02"
Main Color: Silver Tone
Made of 304 stainless steel material, very good corrosion resistance.
Package Quantity: 100Pcs
A Lock washer exerts a spring force between the fasteners head and the substrate, which maintains the washer hard against the substrate and the bolt thread hard against the nut or substrate thread, creating more friction and resistance to rotation.
Application: Perfect for electrical connections on household and commercial appliances, automotive and marine uses in which the power source has a threaded/bolt-type connection.