5640321002 Lawn Mower Blade Bolt Nut 5630351002 Replacement EGO Lawn Mower Blade Bolt LM2135SP LM2156SP LM2100SP LM2130SP LM2150SP Compatible with ego 21 inch Mower Blade Bolts Nuts - 2 Packs

What It Is

This is a replacement blade bolt and nut set (2 packs) designed specifically for EGO 21-inch cordless lawn mowers. It secures the mower blade to the spindle, ensuring safe and effective cutting.

Fitment & Compatibility

Before buying, confirm your mower model: this set fits EGO LM2135SP, LM2156SP, LM2100SP, LM2130SP, and LM2150SP 21-inch mowers. The bolt is an OEM-style replacement (part #5640321002 for the bolt, #5630351002 for the nut), not a universal aftermarket part. Check that your existing bolt/nut uses the same thread pitch and head size—these are metric, typically M8 x 1.25. If your mower uses a different bolt (e.g., from a different brand or older EGO model), this won’t work. Always verify your model number on the mower’s underside or manual.

Key Things to Know

• Quality: These are genuine EGO replacement parts, not cheap knock-offs. They’re hardened steel to handle blade torque without stripping.
• Installation difficulty: Easy—requires a wrench or socket (usually 13mm or 15mm, check your mower). No special tools needed, but torque to manufacturer spec (around 30-40 ft-lbs) to avoid loosening.
• Common gotchas: The bolt has a specific shoulder length to fit the blade and spacer alignment. Using a generic bolt can cause blade wobble or damage. Also, these are sold in a 2-pack, so you have a spare—but check if your mower uses one or two bolts per blade (most EGO 21-inch use one).
• Thread lock: Apply a small drop of blue Loctite to prevent vibration loosening, though not strictly required if torqued correctly.

Should You Buy It

If you own one of the listed EGO 21-inch mowers and need to replace a lost, stripped, or worn blade bolt/nut, this is the exact OEM part—no guesswork. It’s a safe, affordable fix for DIY maintenance. Skip it if your mower is a different brand or older EGO model without this specific bolt pattern.