Blade Mounting Hardware Assembly Compatible with Ryobi 20 inch Brushless 40v Lawn Mower (fit for RY401011,Ry401011, Ry401012, Ry401011Vmn, Ry401012Vmn, RY40108, RY40109 Model)

What It Is

This blade mounting hardware assembly secures the mower blade to the spindle on Ryobi 20-inch 40v brushless mowers. It includes the bolt, washer, and any necessary spacers for proper blade attachment and torque transfer.

Fitment & Compatibility

Before buying, confirm your mower model is one of these: RY401011, RY401011Vmn, RY401012, RY401012Vmn, RY40108, or RY40109. This hardware is designed specifically for the 20-inch deck on Ryobi 40v brushless models—not for 21-inch or 16-inch decks, and not for gas-powered Ryobi mowers. Measure the original bolt diameter (typically 5/16″ or 3/8″) and thread pitch; this assembly matches OEM specs but is aftermarket. Check that your blade’s center hole size matches the bolt. If you have a different Ryobi electric mower (e.g., 18v or 21-inch), this will not fit.

Key Things to Know

• Quality: Aftermarket hardware is often slightly less robust than OEM. Inspect threads for burrs before installation.
• Installation difficulty: Easy—requires a socket wrench and torque wrench (recommended 30-40 ft-lbs). No special tools.
• Common gotcha: Reuse the original blade washer if included—some aftermarket sets omit the anti-scalp cup. Verify all parts are present before starting.
• Torque matters: Over-tightening can strip threads; under-tightening can loosen during use. Use a torque wrench.

Should You Buy It

Buy this if you need a direct replacement for worn or lost hardware on one of the listed Ryobi 20-inch 40v brushless mowers and want a budget-friendly option (under $16). Skip it if you prefer OEM parts for maximum durability or if your mower is a different model—fitment is narrow.