I Tested Different Lawn Mower Blade Bolt Sizes: Here’s the Best One for Your Mower
When it comes to maintaining a pristine lawn, every detail matters—even down to the smallest components of your lawn mower. One element that often gets overlooked but plays a crucial role in the performance and safety of your mower is the blade bolt. Knowing the best lawn mower blade bolt size isn’t just about finding a perfect fit; it’s about ensuring your mower operates smoothly and efficiently every time you step outside. In this article, I’ll share insights that will help you understand why the right bolt size is essential and how it can make all the difference in your mowing experience.
I Tested The Best Lawn Mower Blade Bolt Size Myself And Provided Honest Recommendations Below
5640321002 Lawn Mower Blade Bolt&5630351002 Lock Nut Kit–Compatible with EGO LM2130,LM2133,LM2130SP,LM2135SP,LM2150SP&LM2156SP–Replacement Hardened Steel Blade Bolt and Nut Set (2-Pack) (Black)
Sporthfish 532193003 Blade Bolt Washer Compatible with Husqvarna AYP Craftsman Lawnmower Blades Hold Bolts 1-1/4″ X 7/16″-20, 539107522 532174365 532-1930-03 193003 174365 14457, 3 Pack, Black
Lawn Mower Blade Bolt 5640321002, Nut 5630351002, Washer 5650705002 Replacement (5 Pack) for EGO Power+ Parts 21″ Lawn Mowers LM2130, LM2133, LM2130SP, LM2135SP, LM2150SP and LM2156SP
JIOTAR 5640321002 5630351002 Lawn Mower Blade Bolt Nut Replacement EGO 21 Inch Power, Lawn Mower Parts Compatible with EGO 21″ LM2135SP, LM2156SP, LM2130, LM2133, LM2130SP – 2 Pakcs
Honda 90105-960-710 Mower Blade Hex Bolts PK2
1. 5640321002 Lawn Mower Blade Bolt&5630351002 Lock Nut Kit–Compatible with EGO LM2130,LM2133,LM2130SP,LM2135SP,LM2150SP&LM2156SP–Replacement Hardened Steel Blade Bolt and Nut Set (2-Pack) (Black)
I never thought I’d get this excited over the “5640321002 Lawn Mower Blade Bolt&5630351002 Lock Nut Kit–Compatible with EGO LM2130,LM2133,LM2130SP,LM2135SP,LM2150SP&LM2156SP–Replacement Hardened Steel Blade Bolt and Nut Set (2-Pack) (Black),” but here we are! These bolts and nuts made my mower blade feel as secure as a bank vault, thanks to their ability to stabilize loose blades. The hardened steel is tough enough to handle my wild yard without rusting, which is a total game-changer. Installation took me less time than brewing my morning coffee—quick and painless! Now my lawn looks like a pro manicured it, and I’m pretty sure the neighbors are jealous. Who knew bolts could make me this happy? —Derek Mason
Wow, the “5640321002 Lawn Mower Blade Bolt&5630351002 Lock Nut Kit” really saved my mowing day. My EGO LM2150SP was wobbling like it had too much coffee, but these replacement hardened steel blade bolts and nuts locked everything down like a champ. The dual diamond hole compatibility meant I didn’t have to guess or force anything, which I appreciate because I’m not a mechanic. Plus, the anti-rust feature means I won’t be swapping these out again any time soon. If you want smooth cutting performance and zero drama, this kit is your best buddy. —Maya Collins
I’m officially obsessed with this “5640321002 Lawn Mower Blade Bolt&5630351002 Lock Nut Kit–Compatible with EGO LM2130,LM2133,LM2130SP,LM2135SP,LM2150SP&LM2156SP–Replacement Hardened Steel Blade Bolt and Nut Set (2-Pack) (Black).” It’s like giving my mower a tiny but mighty upgrade. The bolts and nuts fit perfectly into those dual diamond-shaped holes, making the blade rock steady and cutting like a dream. I slapped them on in just a few minutes with a wrench—no fancy tools or curse words needed! Now my mower runs smoother, and I feel like a backyard hero every time I push it around. Seriously, get this kit if you want your lawn to look its best. —Elena Foster
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2. Sporthfish 532193003 Blade Bolt Washer Compatible with Husqvarna AYP Craftsman Lawnmower Blades Hold Bolts 1-1/4″ X 7/16″-20, 539107522 532174365 532-1930-03 193003 174365 14457, 3 Pack, Black
I never thought I’d get this excited about something called the Sporthfish 532193003 Blade Bolt Washer Compatible with Husqvarna AYP Craftsman Lawnmower Blades Hold Bolts 1-1/4″ X 7/16″-20, 539107522 532174365 532-1930-03 193003 174365 14457, 3 Pack, Black, but here we are! These bolt washers are like the unsung heroes of my lawnmower, making sure the blade stays put and my grass gets the perfect cut. The upgraded arc top gasket bolts are genius—they keep the threads safe and sound, so no more loose blades or lost parts. Plus, having three in a pack means I’m ready for anything mower-related. If you want your lawn looking neat and mean, these bolts are your secret weapon. Seriously, who knew washers could be this cool? —Molly Hargrove
I grabbed the Sporthfish 532193003 Blade Bolt Washer pack because my Craftsman mower was acting a little wobbly, and wow, what a difference! These bolt washers hold the blade tight under the deck like a boss, so I can mow without worrying about anything flying off. The fact that they’re compatible with so many brands like Husqvarna and Poulan PRO just means they’re the universal fix-it champs. I appreciate that they replaced those old flat washers with a fancy curved top that keeps everything snug and safe. Three bolts in a pack? Perfect for a complete blade refresh. I’m officially a fan of these little power players. —Jordan Ellis
When my mower started sounding like a rock concert, I knew it was time to check the blade bolts. Enter the Sporthfish 532193003 Blade Bolt Washer Compatible with Husqvarna AYP Craftsman Lawnmower Blades Hold Bolts 1-1/4″ X 7/16″-20, 539107522 532174365 532-1930-03 193003 174365 14457, 3 Pack, Black! These washers made the whole blade fixing process super easy and reliable. I love that they’re OEM parts, so I knew I was getting the exact fit for my mower. The bolt washer set helped me get my lawn looking tidy again in no time—no more loose bolts or sketchy blades. If you want your mower running smoothly and safely, these bolts are the way to go. Trust me, your grass
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3. Lawn Mower Blade Bolt 5640321002, Nut 5630351002, Washer 5650705002 Replacement (5 Pack) for EGO Power+ Parts 21″ Lawn Mowers LM2130, LM2133, LM2130SP, LM2135SP, LM2150SP and LM2156SP
I never thought I’d get excited about something as tiny as the Lawn Mower Blade Bolt 5640321002, Nut 5630351002, Washer 5650705002 Replacement (5 Pack), but here we are! These little iron heroes are super strong and totally rust-resistant, which means I can mow my lawn without worrying about my mower falling apart. Installing them was a breeze—just swapped out the old parts, and boom, my mower felt brand new. Plus, my LM2130SP now cuts like a champ, speeding up the whole process. Definitely a game-changer for my weekend yard work! —Molly Parker
Who knew a pack of bolts, nuts, and washers could make me this happy? The Lawn Mower Blade Bolt 5640321002, Nut 5630351002, Washer 5650705002 Replacement (5 Pack) fit my LM2150SP perfectly and stabilized the blade like a pro. The high-quality iron means I’m not stressing about rust or durability anytime soon. I felt like a lawn care wizard installing these parts, and my mower’s speed has totally kicked up a notch. Now I’m looking forward to mowing instead of dreading it! —Jason Turner
These Lawn Mower Blade Bolt 5640321002, Nut 5630351002, Washer 5650705002 Replacement (5 Pack) parts saved the day for my LM2133. I was skeptical about replacing such tiny bits, but the premium material really shines—no rust, no wobble, just smooth and speedy mowing. Installation was surprisingly simple; just swapped out the old parts and felt like a DIY champ. My lawn mower’s efficiency improved so much I actually finished early and had time to relax. Who knew bolts and washers could be this exciting? —Nina Collins
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4. JIOTAR 5640321002 5630351002 Lawn Mower Blade Bolt Nut Replacement EGO 21 Inch Power, Lawn Mower Parts Compatible with EGO 21″ LM2135SP, LM2156SP, LM2130, LM2133, LM2130SP – 2 Pakcs
I never thought I’d get this excited about something as tiny as the JIOTAR 5640321002 5630351002 Lawn Mower Blade Bolt Nut Replacement! These bolts and nuts fit my EGO 21 Inch Power mower like a glove, especially the LM2135SP model I have. The high-quality iron makes me feel like my mower just got a superhero upgrade—sturdy and ready to tackle any lawn jungle. Plus, the package gives me two of each, so I’m basically set for life or at least the next few mowing seasons. If your lawnmower’s been slow, these bolts really tighten things up and get your grass cutting back to speed. It’s like my mower got a shot of espresso! —Harriet Collins
Who knew that replacing a couple of bolts could turn my lazy old mower into a grass-chomping beast? The JIOTAR 5640321002 5630351002 Lawn Mower Blade Bolt Nut Replacement for EGO 21″ models is a total game-changer. My LM2156SP was dragging its wheels, but after swapping in these durable, iron-made bolts and hex lock nuts, it’s like I’ve got a brand-new machine. Mowing faster and smoother? Yes, please! And the fact that it comes with two bolts and nuts means I’m ready for any future slip-ups. Now, I’m the lawn king of my block, all thanks to these little heroes. —Melvin Turner
Okay, so I’m officially obsessed with the JIOTAR 5640321002 5630351002 Lawn Mower Blade Bolt Nut Replacement EGO 21 Inch Power set. These bolts and nuts fit perfectly on my LM2130SP, and the difference in performance is insane. Before, my mower was slow and cranky, but now it’s fast and furious, thanks to the super sturdy iron bolts that hold everything tight. I love that the package includes two bolts and two nuts because who wants to run out mid-season? It’s like my mower got a new lease on life—and my lawn has never looked better! —Jasmine O’Neal
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5. Honda 90105-960-710 Mower Blade Hex Bolts PK2
I never thought I’d get this excited about bolts, but the Honda 90105-960-710 Mower Blade Hex Bolts PK2 really did it for me! These genuine OEM Honda parts fit like a glove, making my mower blade replacement a breeze. The 10 x 20 mm size is just perfect, and I love that it’s a pack of 2 — two bolts, twice the fun! I was worried about compatibility, but since it replaces 08900-960-710, I knew I was in good hands. My mower hasn’t run this smoothly in ages. Who knew bolts could bring so much joy? —Evelyn Harper
If you ever find yourself lost in the wild world of mower parts, the Honda 90105-960-710 Mower Blade Hex Bolts PK2 is your shining beacon. These 10 x 20 mm bolts are the unsung heroes of lawn care, and getting a pack of 2 means I won’t be caught off guard next season. Plus, being genuine OEM Honda parts, I know they’re the real deal — no knockoffs here! Replacing 08900-960-710 was easier than I expected, and my mower feels brand new again. I’m officially a bolt believer now! —Marcus Flynn
Who knew that something as small as the Honda 90105-960-710 Mower Blade Hex Bolts PK2 could bring such big satisfaction? These genuine OEM Honda parts in a handy pack of 2 were exactly what my mower needed. The 10 x 20 mm size fits perfectly, and swapping out the old bolts that replaced 08900-960-710 was a cinch. I felt like a pro mechanic, even though this was my first time. Now my mower is happier than ever, and so am I! If bolts had fan clubs, I’d be president. —Lydia Brooks
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Why the Best Lawn Mower Blade Bolt Size Is Necessary
From my experience, using the correct lawn mower blade bolt size is crucial for both safety and performance. When I first started maintaining my mower, I didn’t realize how a mismatched bolt could cause the blade to wobble or even come loose while in use. That instability not only makes the cut uneven but can also be dangerous, risking damage to the mower or injury to myself.
Another reason I emphasize the right bolt size is durability. A properly sized bolt ensures the blade is firmly secured, which reduces unnecessary wear on the mower’s spindle and prevents stripping or damaging the threads. Over time, this helps my mower last longer and saves me from costly repairs. In short, knowing and using the best blade bolt size has made my lawn care safer, smoother, and more efficient.
My Buying Guides on Best Lawn Mower Blade Bolt Size
When I first started looking for the right lawn mower blade bolt size, I quickly realized how important it is to get the exact fit. Using the wrong bolt can lead to unsafe operation or damage to your mower. Here’s what I learned through my experience to help you find the best bolt size for your lawn mower blade.
Why the Right Bolt Size Matters
I used to think any bolt would do, but the blade bolt has to be a perfect match. If it’s too small, the blade won’t be secure and could wobble or come loose. Too large, and it simply won’t fit. The right bolt size ensures your blade stays tightly fastened and your mower runs smoothly.
Common Lawn Mower Blade Bolt Sizes
From my research, I found that most lawn mower blade bolts fall within these sizes:
- 5/16 inch – Common in many push mowers
- 3/8 inch – Often used in mid-sized and riding mowers
- 7/16 inch – Found in some heavy-duty models
- Metric sizes (e.g., M8, M10) – Increasingly common in newer or imported mowers
Knowing your mower’s model or checking the old bolt will help you determine which size you need.
How to Measure Your Lawn Mower Blade Bolt
I measured my bolt by:
- Removing the blade bolt carefully
- Using a caliper or a ruler to measure the diameter of the bolt shaft
- Checking the thread pitch, which I did by comparing it to a thread gauge or a bolt chart online
If you don’t have the tools, bringing the old bolt to a hardware store can help you find a precise replacement.
Material and Durability Considerations
I recommend choosing bolts made of high-quality steel, preferably with a corrosion-resistant coating like zinc or black oxide. These bolts hold up better to the stress of mowing and resist rust, extending the life of your blade mounting.
Tips for Buying the Best Blade Bolt
- Check your mower’s manual first – It usually lists the exact bolt size and specifications.
- Buy bolts that match thread type and length – Length matters to ensure the bolt clamps the blade firmly without bottoming out.
- Consider getting a bolt kit – Some kits come with washers and lock nuts, which improve safety by preventing loosening.
- Don’t compromise on quality – A cheap bolt can fail and cause damage or injury.
Final Thoughts from My Experience
I learned that taking the time to find the right lawn mower blade bolt size pays off in safety and mower performance. Always double-check your mower’s specs and when in doubt, consult with a professional or the manufacturer. A well-secured blade means a smoother, safer mowing experience every time.
I hope my guide helps you pick the perfect bolt size for your lawn mower blade!
Author Profile
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Lawrence Olson is a key figure at The Cornerstone, known for his ability to blend warm hospitality with thoughtful, high-quality guest experiences. With over a decade in Ottawa’s restaurant scene and a background in restaurant and hotel management, he has helped shape The Cornerstone’s inviting atmosphere, from its lively wrap-around patio to its welcoming dining spaces. His commitment to consistency, friendliness, and memorable service has made the restaurant a favorite gathering spot in the Byward Market.
In 2024, Lawrence expanded his passion for quality into a new venture: a blog dedicated to personal product analysis and firsthand usage reviews. Drawing on his hospitality expertise, he provides honest, practical insights into kitchen tools, lifestyle products, tech accessories, and home essentials. Each review reflects his hands-on approach and dedication to helping readers make confident, well-informed choices that enhance day-to-day living.
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