Safety Washer

A safety washer is a washer with a raised edge or tab that helps hold a fastener in place. It is used where a standard flat washer might allow loosening.

A safety washer is placed under a fastener head to prevent loosening under load. It is used with various bolts and nuts to maintain connection integrity.

This kind of washer is often made in spring steel or stainless steel. The material affects how well it grips and how it resists corrosion.

This is a general guide to checking this kind of part. It says nothing about any supplier's parts.

Ask for a certificate of conformance if you need proof of material or dimensions. Check that the washer is flat, the tab or edge is formed correctly and there are no cracks.