http://www.jinruibolt.com/washer/ Custom Washer Spring washers are also called lock washers. The materials of DIN127 spring washers are stainless steel and carbon steel. The commonly used stainless steel/zinc plated spring washers are size M3, M4, M5, M6, M8, M10, M12, M14, M16,M20 etc. The spring washer can prevent loosening and increase the pre-tightening force, while the flat washer does not have this function. DIN127 spring washer can be used to increase the contact area, prevent the friction between the bolt and the workpiece, and protect the surface of the connector to prevent bolts being scratched when tightening nuts. Production Process of Spring washer Specification of Spring washer Size
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