Check the listing for details. M4 Split Lock Washer, 200Pcs Carbon Steel Spring Lock Washers. Condition: New. Listed at 10.08 USD. Description:Made of durable carbon steel material with a black oxide surface treatment, rust and corrosion resistant, not easy to deform and has good wear resistance, ensuring a long-term used and performance.Split lock washers provide a reliable, secure fastening solution that act as a cushioning and locking mechanism between nuts, bolts, or screws and the surface, protecting fastened components from vibration loosening.The spring washers are easy to install, requiring no other tools. They can be easily inserted between the fastener and the surface, either manually or with standard tightening equipment, ensuring a secure and reliable connection.Suitable for various applications, the metal spring washers can be used in automotive, construction, machinery, household and commercial appliances, furniture repair, and more.