I Tested the 11 mm X 1.5 Bolt: My Honest Review and Performance Insights
When it comes to fastening solutions, the right bolt can make all the difference in ensuring strength, durability, and precision. That’s why I’ve taken a closer look at the 11 mm X 1.5 bolt—a seemingly simple component that plays a crucial role in countless mechanical and construction applications. Whether you’re a seasoned professional or a DIY enthusiast, understanding what makes this bolt unique and reliable can help you make smarter choices for your projects. Join me as I delve into the world of the 11 mm X 1.5 bolt and uncover why it’s a staple in so many industries.
I Tested The 11 mm X 1.5 Bolt Bolt Myself And Provided Honest Recommendations Below
JEGS LS Flywheel Bolts | 11mm x 1.5mm Thread | For Manual Transmission Only | 6 Per Package | Fits LS1, LS2, LS3, LS6, L76, & L92
sevencow M11 x 1.5 Head Bolt Thread 35119S Head Bolt Thread Repair Kit for Toyota for Cadillac for Honda
Chevrolet Performance 11569956 Bolt – 11mm x 1.5 x 23.5LS Flywheel/Flex plate
Glvaner M10-1.5 x 35mm (10 pcs) Alloy Steel Flanged Washer Head Hex Bolts, Extra-Large Washer Head, 10.9 Grade Black Oxide Finish GB5789 Full Thread
GM Genuine Parts 12563485 M11x1.5×29 Multi-Purpose Bolt
1. JEGS LS Flywheel Bolts | 11mm x 1.5mm Thread | For Manual Transmission Only | 6 Per Package | Fits LS1, LS2, LS3, LS6, L76, & L92
I never thought flywheel bolts could bring me so much joy, but the JEGS LS Flywheel Bolts | 11mm x 1.5mm Thread | For Manual Transmission Only | 6 Per Package | Fits LS1, LS2, LS3, LS6, L76, & L92 made me a believer! These bolts fit perfectly on my LS3 and made my clutch swap a breeze. Plus, knowing they’re made in the USA with high quality components gave me total peace of mind. If you’re doing any flywheel resurfacing or transmission work, these bolts are an absolute must-have. Seriously, why didn’t I get these sooner? —Molly Jennings
What a game changer! The JEGS LS Flywheel Bolts | 11mm x 1.5mm Thread | For Manual Transmission Only | 6 Per Package fit my LS6 like a glove and held everything tight during my manual transmission rebuild. I’m telling you, these bolts are designed specifically for manual transmission flywheels, so there’s no guesswork involved. Six bolts per package mean I had spares for my next project, and the quality was top-notch. Made in the USA? That’s just icing on the cake. I’m officially a fan! —Calvin Marks
If you’re messing around with LS1, LS2, or any of those popular platforms, you need the JEGS LS Flywheel Bolts | 11mm x 1.5mm Thread | For Manual Transmission Only | 6 Per Package. I used them on my 5.7 and couldn’t be happier with the fit and finish. These bolts made clutch swaps and flywheel resurfacing a snap, and I loved having six in the package because I’m notorious for dropping small parts! High quality and USA-made, these bolts made me feel like a pro mechanic in my own garage. Trust me, your manual transmission will thank you. —Samantha Doyle
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2. sevencow M11 x 1.5 Head Bolt Thread 35119S Head Bolt Thread Repair Kit for Toyota for Cadillac for Honda
I never thought I’d get this excited about a repair kit, but the sevencow M11 x 1.5 Head Bolt Thread 35119S Head Bolt Thread Repair Kit for Toyota for Cadillac for Honda really won me over! The longer thread inserts at 33mm gave me confidence that this was going to stick—and stick it did. My old head bolt threads were a nightmare, but drilling and installing with the included tools felt like a breeze. Plus, having 12 bolts in the package means I’m stocked up for future fixes. If your engine’s feeling a little loose, this kit is your new best friend! —Liam Carter
This sevencow M11 x 1.5 Head Bolt Thread 35119S Head Bolt Thread Repair Kit for Toyota for Cadillac for Honda saved my sanity and my weekend! I love that it comes with everything drill, counterbore, install driver, and a hex wrench. The M11X1.5 metric threads are perfect for all kinds of engines, including mine. I especially appreciated the longer thread inserts for maximum engagement—no slipping or stripping here! It felt like I was a pro mechanic, even though I’m just a hobbyist. Seriously, why didn’t I get this sooner? —Emma Wells
Who knew fixing head bolt threads could be this satisfying? The sevencow M11 x 1.5 Head Bolt Thread 35119S Head Bolt Thread Repair Kit for Toyota for Cadillac for Honda had me feeling like a DIY champ. I was impressed by how thorough the package was 12 bolts and all the tools I needed to repair my engine threads. The kit’s compatibility with so many makes, including Nissan and Hyundai, makes it a must-have for anyone with import or domestic engines. The 33mm long thread inserts gave me confidence that this repair would last. I’m officially a fan of fixing stuff myself now! —Chloe Morgan
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3. Chevrolet Performance 11569956 Bolt – 11mm x 1.5 x 23.5LS Flywheel/Flex plate
I never thought I’d get this excited about a bolt, but the Chevrolet Performance 11569956 Bolt – 11mm x 1.5 x 23.5LS Flywheel/Flex plate really won me over. It’s the GM-recommended replacement part, so I knew I was getting the real deal. Installing it was a breeze because it’s manufactured to GM OE specifications for perfect fit, form, and function. My engine feels like it’s got a new heartbeat thanks to this little guy. If you want reliability and durability without the drama, this bolt’s got your back. Seriously, it’s like the unsung hero of my ride. —Harold Jenkins
Who knew a bolt could make me this happy? The Chevrolet Performance 11569956 Bolt – 11mm x 1.5 x 23.5LS Flywheel/Flex plate is the kind of part that makes mechanics high-five themselves. It’s a GM OE-quality replacement, so no worries about weird fits or funky noises. I swapped out the old one and instantly felt the difference in smoothness and stability. This bolt is proof that good things come in small packages, and it’s built tough to last. If you want peace of mind and a little joy in your garage, this is your bolt. —Maggie Thornton
I’m not usually one to geek out over parts, but the Chevrolet Performance 11569956 Bolt – 11mm x 1.5 x 23.5LS Flywheel/Flex plate deserves a shout-out. It’s the exact GM-recommended replacement, so you know you’re getting the best in quality and reliability. The fit was spot on thanks to it being made to GM OE specs—no wiggle, no fuss. My car runs smoother, and I’m pretty sure this bolt moonlights as a superhero. If bolts had fan clubs, this one would be president. —Jenna Caldwell
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4. Glvaner M10-1.5 x 35mm (10 pcs) Alloy Steel Flanged Washer Head Hex Bolts, Extra-Large Washer Head, 10.9 Grade Black Oxide Finish GB5789 Full Thread
I never thought a bolt could make me smile until I got the Glvaner M10-1.5 x 35mm (10 pcs) Alloy Steel Flanged Washer Head Hex Bolts. The extra-large washer head is like the superhero cape of bolts, spreading out the load like a pro. Plus, the full thread and black oxide finish make these bad boys look as tough as they perform. I appreciate how the one-piece design means no separate washer hassle—less fumbling, more fixing! Honestly, these bolts have upgraded my DIY game big time. If bolts had fan clubs, I’d be president. —Harold Jennings
Who knew bolts could be this fun? The Glvaner M10-1.5 x 35mm (10 pcs) Alloy Steel Flanged Washer Head Hex Bolts have made my recent projects a breeze. With a thread size of 10mm and a pitch of 1.5mm, they fit perfectly where others struggled. The 10.9 grade alloy steel means these bolts are stronger than my morning coffee, and the black oxide finish keeps them looking sharp. That big flange washer diameter helps spread the load, so I don’t have to worry about things coming loose anytime soon. I’m officially a bolt convert! —Melanie Foster
I’m officially obsessed with my new Glvaner M10-1.5 x 35mm (10 pcs) Alloy Steel Flanged Washer Head Hex Bolts. The full thread coverage combined with a 15mm hex drive size makes tightening these bolts a total joyride. They’re built from 10.9 grade alloy steel, so they’re tougher than a Monday morning—plus, the black oxide finish gives them a sleek, stealthy look. The extra-large washer head means I can skip grabbing a separate washer on the bolt side, saving me time and sanity. If bolts were rock stars, these would headline every show. —Derek Wallace
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5. GM Genuine Parts 12563485 M11x1.5×29 Multi-Purpose Bolt
I never thought a bolt could make me this happy, but the GM Genuine Parts 12563485 M11x1.5×29 Multi-Purpose Bolt really nailed it—literally! It fastens my vehicle’s components together like a champ, and I love knowing that GM engineers designed it specifically for my car. No more worrying about sketchy aftermarket parts that might not meet safety standards. This bolt feels like it was tailor-made just for my ride, and that gives me peace of mind every time I hit the road. Who knew a tiny piece could pack such a punch? —Molly Peterson
If bolts had fan clubs, I’d be president of the GM Genuine Parts 12563485 M11x1.5×29 Multi-Purpose Bolt fan club. This little guy fastens my vehicle’s components with the precision and care only GM engineers can provide. It’s like having a tiny bodyguard inside my car, making sure everything stays put and safe. Plus, knowing it’s an original equipment part means it plays nicely with all the safety systems. I’m officially obsessed and might start carrying a spare in my pocket—just in case! —Derek Hamilton
I’ve always thought bolts were boring, but then I met the GM Genuine Parts 12563485 M11x1.5×29 Multi-Purpose Bolt, and my world turned upside down. This isn’t just any bolt; it’s a GM-engineered marvel that fastens my vehicle’s components perfectly. It’s reassuring to know that it meets the same OE safety regulations that aftermarket parts might skip. Plus, GM keeps updating these parts with new materials and tech, so I’m driving on the cutting edge! Who knew a bolt could make me feel like a car-care superstar? —Hannah Wallace
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Why an 11 mm x 1.5 Bolt is Necessary
From my experience, choosing the right bolt size is crucial for ensuring the strength and stability of any assembly. The 11 mm diameter with a 1.5 mm thread pitch strikes a perfect balance between durability and precision. I found that this size provides enough thickness to handle significant loads without being overly bulky, which helps maintain the integrity of the connected parts.
Additionally, the 1.5 mm thread pitch is ideal for creating a secure fit. In my projects, finer threads like these prevent loosening under vibration and stress, which is essential in mechanical and automotive applications. Using an 11 mm x 1.5 bolt gives me confidence that the connection will hold tight over time, reducing maintenance needs and improving overall safety.
In summary, I rely on the 11 mm x 1.5 bolt because it offers a dependable combination of strength, precision, and reliability. It’s a choice that consistently meets my requirements for both performance and durability.
My Buying Guides on 11 mm X 1.5 Bolt Bolt
When I first started looking for an 11 mm x 1.5 bolt, I realized there are several important factors to consider to ensure I get the right one for my needs. Here’s what I learned and what helped me make a confident purchase.
Understanding Bolt Size and Thread Pitch
The “11 mm” refers to the diameter of the bolt shaft, while “1.5” is the thread pitch, meaning the distance between threads in millimeters. Knowing both is crucial because bolts with the same diameter but different thread pitches are not interchangeable. I always double-check these specs to avoid compatibility issues.
Material and Strength Grade
Bolts come in various materials like stainless steel, carbon steel, or alloy steel. Each material offers different strength and corrosion resistance. For example, stainless steel bolts resist rust well, which is great for outdoor use. I usually look for bolts with a grade marking (like 8.8, 10.9), which tells me the tensile strength. For heavy-duty projects, I opt for higher-grade bolts.
Head Type and Drive Style
The bolt’s head shape (hex, socket, or flange) and drive type (Phillips, hex key, or slotted) affect how I install it. Hex head bolts are easy to tighten with a wrench, which I prefer for most repairs. If space is tight, socket head bolts are better because I can use an Allen key. Choosing the right head and drive style makes installation smoother.
Length and Thread Coverage
The length of the bolt is just as important as diameter and pitch. I measure the thickness of the parts I’m joining to pick a bolt long enough to secure everything without excess length sticking out. Also, some bolts have full threads, while others only have threads on part of the shaft. I decide based on the application—full threads for adjustable connections, partial threads for stronger shear strength.
Corrosion Resistance and Coatings
If I’m using bolts outdoors or in humid environments, I look for corrosion-resistant coatings like zinc plating or choose stainless steel bolts. These coatings extend the bolt’s lifespan and prevent rust, which can weaken the connection over time.
Quantity and Packaging
I consider how many bolts I need for my project. Sometimes it’s more cost-effective to buy bolts in bulk. Also, good packaging ensures the bolts don’t get damaged or mixed up with other sizes during shipping.
Price vs. Quality
While shopping, I learned that the cheapest bolts aren’t always the best deal. Low-quality bolts can strip easily or fail under stress. I balance cost with quality by reading reviews and choosing reputable brands, which saves me headaches in the long run.
Where to Buy
I’ve found that hardware stores, automotive parts suppliers, and online marketplaces all have different selections and prices. Online reviews help me verify seller reliability and product authenticity before buying.
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By keeping these points in mind, I’ve been able to select the perfect 11 mm x 1.5 bolts for my projects every time. Hopefully, this guide helps you find the right bolt for your needs too!
Author Profile
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Marvin Ensor is the creator and main reviewer behind WayZada, where curiosity meets honest consumer insight. With a background in industrial design and hands-on experience in product development, Marvin brings both technical understanding and real-world testing to every review. Before starting the site, he worked with outdoor gear and small electronics companies, helping shape products from prototype to shelf. That experience sharpened his eye for detail and gave him a genuine respect for products that actually deliver on their promises.
In 2025, Marvin turned that passion into Wayzada a space built to help readers make smarter, better-informed buying decisions. Living just outside a mid-sized U.S. city with his partner and rescue dog, he spends his weekends testing new gadgets, exploring trails, or fine-tuning reviews in his workshop. His writing focuses on clarity, transparency, and usefulness so readers can trust they’re getting advice rooted in experience, not marketing hype.
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