Highly Corrosion Resistant Marine Grade 316 Stainless Steel Serrated washers to create tension between the washers “teeth” and installation surface The added tension makes the fastener assembly resistant to rotation Highly corrosion resistant 316 stainless steel Trade Names: Star Lock Washers

External tooth lock washers are used to lock nuts in place. External Tooth Lock Washers, also known as Star Lock Washers, are serrated washers that create tension between the washer’s teeth and the installation surface. This tension makes the fastener assembly resistant to rotation. External Tooth Lock Washers are used to lock assemblies underneath the head of the fastener or a nut.