EGO Power+ Parts 5640321002 Support Bolt for Blades on LM2130, LM2133, LM2130SP, LM2135SP, LM2150SP & LM2156SP 21" Select Cut Lawn Mowers

What It Is

The EGO 5640321002 Support Bolt is a factory replacement fastener that secures the blade to the spindle on EGO’s 21-inch Select Cut mowers. It’s designed for the LM2130, LM2133, LM2130SP, LM2135SP, LM2150SP, and LM2156SP models, ensuring the blade stays locked during operation.

Fitment & Compatibility

• Exact fit for: EGO 21” Select Cut mowers listed above (LM2130, LM2133, LM2130SP, LM2135SP, LM2150SP, LM2156SP). Not for older EGO models or other brands.
• What to measure: Bolt thread size is M8 x 1.25 pitch, length approximately 30mm. Verify thread pitch matches your spindle nut—cross-threading can damage the spindle.
• OEM vs aftermarket: This is genuine EGO. Aftermarket bolts may differ in shoulder length or hardness, risking loosening or spindle damage. Stick with OEM for safety.
• Deck size: Only for 21” decks. Not compatible with 20” or 22” EGO models.
• Check before buying: Remove your old bolt and compare thread pitch, shoulder length, and head shape. If your mower uses a different bolt (e.g., for a mulching blade kit), verify compatibility.

Key Things to Know

• Quality: Grade 8.8 steel, zinc-plated to resist rust. Holds torque reliably under vibration.
• Installation: Use a torque wrench set to 35-40 ft-lbs. Overtightening can strip the threads or crack the blade; undertightening risks the blade flying off.
• Common gotcha: The bolt has a built-in shoulder that must sit flush against the blade. If you stack a washer or adapter, you may lose proper clamping force.
• Replacement interval: Replace every time you install a new blade or after 2-3 blade sharpenings. The bolt’s threads wear out and can stretch over time.

Should You Buy It

If you own one of the listed EGO 21” Select Cut mowers and need a factory-spec blade bolt, this is the correct choice. It’s a simple, low-cost safety item—don’t risk a cheap aftermarket bolt that could fail mid-cut. Buy one as a spare when you replace blades.