The OMRON A22NZ-A-403 is a high-quality locking ring designed for use with the A22N Series Push Button Switches. This essential component ensures a secure fit, preventing rotation within the operation unit, and is ideal for 22.3-mm panel hole diameters. Featuring a rubber seal, it enhances the durability and reliability of your control panel setups. Perfect for industrial automation applications, this locking ring is a critical accessory for maintaining the integrity of your push button systems.