Key Features

• Concave washer geometry designed to distribute fastener load over a wider surface, reducing localized pressure on joints.
• Specifically associated with John Deere equipment (M172218), aligning with OEM fastener assemblies requiring this washer profile.
• Material options include metal, felt, fiber, or other materials, depending on the application, allowing selection for environmental resistance or electrical isolation as needed.
• Thickness range compressed to t > 0.77 mm and t ≤ 9.53 mm (0.78–9.53 mm), ensuring compatible clearance and preload across compatible fasteners.
• Contributes to maintaining preload in vibration-prone or dynamic assemblies by providing a stable seating under the fastener head or nut.

Product Details

• Type: Concave washer
• Function: Installed under a bolt head, rivet head, or nut/fastener to distribute pressure, control spacing, and help achieve a predetermined preload.
• Thickness specification: > 0.77 mm and ≤ 9.53 mm (range 0.78–9.53 mm)
• Material variability: Can be metal, felt, fiber, or other materials depending on the application and manufacturer specifications.
• Part reference: John Deere M172218

Compatibility

• Designed for John Deere equipment that requires concave washers within the specified thickness range.
• Suitable for fastener assemblies where the washer seat and spacing must be maintained under the bolt head or nut.
• Verify compatibility with the corresponding bolt/nut size and joint tolerances of your John Deere installation.