Carbon Steel Serrated Washer

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About this category

Lock washers (AW series) used together with the matching bearing lock nuts, with a ring of tabs around the outside. The inner tang sits in the shaft keyway so the washer cannot turn; once the nut is tightened one outer tab is bent into a slot in the nut, and the nut can no longer move - the traditional and most reliable way to lock a bearing on a shaft. Numbering matches the nuts, AW00 with AN00, and the bracketed figure is the shaft diameter.

Standards JIS B 1554

How to choose

• Buy the washer and nut as a pair - AW00 goes with AN00.
• The bracketed number is the shaft diameter, not the nut size.
• A bent tab work-hardens; do not reuse a washer that has been removed.
• The shaft needs a keyway for the inner tang, otherwise the locking scheme does not work.