External and Internal

Zinc Plated Internal Tooth Lock Washers are designed to help prevent fasteners from loosening due to vibration and movement. The internal teeth grip securely beneath the fastener head, providing a reliable locking action and a neat finished appearance.

Stainless Steel Internal Tooth Lock Washers are designed to help prevent fasteners from loosening due to vibration and movement. The internal teeth grip securely against the fastener and mating surface, providing a reliable locking action in compact applications.

Zinc Plated External Tooth Lock Washers are designed to improve fastening security by helping prevent loosening caused by vibration and movement. The external teeth grip into the mating surface and fastener head for a firm, reliable hold.

Stainless Steel External Tooth Lock Washers are designed to provide a secure, vibration-resistant fastening solution. The external teeth bite into the mating surface and fastener head, helping to prevent loosening in demanding applications.