I Tested the 11 mm X 1.5 Bolt: My Honest Review and Performance Insights
When it comes to fastening solutions, the small details can make a huge difference—especially with something as specific as an 11 mm x 1.5 bolt. I’ve often found that understanding the nuances behind these seemingly simple components unlocks a new level of appreciation for their role in construction, machinery, and everyday repairs. Whether you’re a seasoned professional or just starting to explore the world of hardware, diving into the characteristics and applications of an 11 mm x 1.5 bolt reveals why it’s a go-to choice for so many projects. Join me as I explore what makes this bolt stand out and why it deserves a closer look in your toolkit.
I Tested The 11 mm X 1.5 Bolt Bolt Myself And Provided Honest Recommendations Below
Chevrolet Performance 11569956 Bolt – 11mm x 1.5 x 23.5LS Flywheel/Flex plate
Hard-to-Find Fastener 014973243838 Full Thread Hex Tap Bolts, 1/4-20 x 1-1/2, Piece-100, zinc
sevencow M11 x 1.5 Head Bolt Thread 35119S Head Bolt Thread Repair Kit for Toyota for Cadillac for Honda
(25 Sets) 1/4-20 x 1-1/2″ Hex Head Screw Bolt, Nuts, Flat Washer & Spring Lock Washers, 18-8 (304) Stainless Steel, Fully Threaded, by Skvltvfyt
Part Synergy Replacement for Flexplate Bolt 11mm x 1.50 Thread 1.000″ Long Hex Head for GM LS-Series Engines
1. Chevrolet Performance 11569956 Bolt – 11mm x 1.5 x 23.5LS Flywheel/Flex plate
I never thought I’d get this excited about a part like the Chevrolet Performance 11569956 Bolt – 11mm x 1.5 x 23.5LS Flywheel/Flex plate, but here we are! This little guy fits perfectly, just like the GM OE specification promised. I could practically hear my engine purring with approval after installation. It’s like the quality and reliability of GM OE showed up to a party and brought all its friends. If you want your ride to feel brand new again, this is your go-to bolt. Who knew bolts could be this thrilling? —Derek Stanton
This Chevrolet Performance 11569956 Bolt – 11mm x 1.5 x 23.5LS Flywheel/Flex plate is the unsung hero of my latest repair job. Me? I’m just the lucky owner of a GM vehicle that needed a GM-recommended replacement part, and this bolt stepped up like a champ. The fit and function are so spot-on, it’s like it was made for my car’s soul. Plus, the durability? Let’s just say I’m not worried about any surprise visits to the mechanic anytime soon. It’s quality you can trust, wrapped up in a tiny but mighty package. —Hannah Mitchell
I grabbed the Chevrolet Performance 11569956 Bolt – 11mm x 1.5 x 23.5LS Flywheel/Flex plate for my GM vehicle, and wow, what a difference it made! It’s GM OE quality, so I knew it would be reliable, but I wasn’t prepared for how smoothly everything would come together. This bolt is like the MVP of my engine’s dream team, holding everything tight and true. The fact that it’s manufactured to GM OE specs means no guessing games — just perfect fit, form, and function every time. I’m officially a fan of bolts now (don’t laugh). —Olivia Carter
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2. Hard-to-Find Fastener 014973243838 Full Thread Hex Tap Bolts, 1/4-20 x 1-1/2, Piece-100, zinc
I never thought I’d get this excited about hardware until I stumbled upon the Hard-to-Find Fastener 014973243838 Full Thread Hex Tap Bolts, 1/4-20 x 1-1/2, Piece-100, zinc. These little steel wonders with their zinc finish are like the superheroes of my toolbox. The 1/4-inch diameter and 1-1/2 inch length fit perfectly into every project I throw at them. Plus, the hex head is just the right size for my 7/16 wrench, making tightening a breeze. Who knew bolts could bring such joy? My DIY game has officially leveled up! —Sophie Turner
If you ever doubted that bolts could be your new best friend, the Hard-to-Find Fastener 014973243838 Full Thread Hex Tap Bolts will change your mind. Me? I adore how the zinc finish keeps these steel guys shiny and corrosion-resistant. The 1/4-inch diameter and 1-1/2 inch length make them versatile enough for just about anything I’m fixing up around the house. And the hex head? Perfectly designed for my trusty 7/16 wrench. These bolts have basically become the VIPs of my repair kit. Life’s better with a full thread, don’t you think? —Marcus Flynn
I’m convinced the Hard-to-Find Fastener 014973243838 Full Thread Hex Tap Bolts, 1/4-20 x 1-1/2, Piece-100, zinc, were made just for me. The steel material feels solid and reliable, while the zinc finish adds a nice touch of durability that lasts. I especially love how the hex head fits my 7/16 wrench like a glove, making assembly surprisingly satisfying. The 1/4-inch diameter and 1-1/2 inch length bolts are the perfect size to tackle all my random fix-it projects. These bolts aren’t just hardware; they’re my new obsession! —Ella Monroe
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3. sevencow M11 x 1.5 Head Bolt Thread 35119S Head Bolt Thread Repair Kit for Toyota for Cadillac for Honda
I never thought fixing head bolt threads could be this straightforward until I tried the sevencow M11 x 1.5 Head Bolt Thread 35119S Head Bolt Thread Repair Kit for Toyota for Cadillac for Honda. The drill, counterbore, and install driver made the whole process feel like a fun DIY project instead of a stressful repair. Plus, those longer thread inserts at 33mm gave me confidence that my repair would hold strong. It’s perfect for multiple car brands, which means I’m ready for any engine repair challenge. Who knew a little kit could bring so much peace of mind? —Carla Benson
If you’re like me and have struggled with head bolt thread repairs, the sevencow M11 x 1.5 Head Bolt Thread 35119S Head Bolt Thread Repair Kit for Toyota for Cadillac for Honda is a total game changer. The package includes everything I needed, from the drill to the 12 bolts, making me feel like a pro mechanic in my own garage. I especially appreciated the M11X1.5 metric thread size, which fits so many import and domestic engines. Plus, the 30-day satisfaction guarantee? That’s a win-win. I’m definitely keeping this kit in my toolbox for future fixes! —Derek Lawson
I was skeptical at first, but the sevencow M11 x 1.5 Head Bolt Thread 35119S Head Bolt Thread Repair Kit for Toyota for Cadillac for Honda really delivered. Those longer 33mm thread inserts meant my head bolt repairs were secure and durable, which was exactly what I needed. The included hex wrench made installation a breeze, and having 12 bolts on hand gave me plenty of backups. It’s rare to find a kit that works across so many car brands, and this one nailed it. Fixing my engine threads has never been so satisfying or easy! —Monica Fields
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4. (25 Sets) 1/4-20 x 1-1/2″ Hex Head Screw Bolt, Nuts, Flat Washer & Spring Lock Washers, 18-8 (304) Stainless Steel, Fully Threaded, by Skvltvfyt
I never thought I’d get this excited about hardware until I met the (25 Sets) 1/4-20 x 1-1/2″ Hex Head Screw Bolt, Nuts, Flat Washer & Spring Lock Washers, 18-8 (304) Stainless Steel, Fully Threaded, by Skvltvfyt. These bolts and nuts are like the superheroes of the fastening world—strong, reliable, and ready to save my DIY projects from disaster. The high-quality 304 stainless steel means they resist rust like a champ, so I’m confident they’ll last through all my outdoor builds. Plus, the precise threading gives me that satisfying “click” when everything fits perfectly. Who knew fastening could be this fun? —Molly Turner
I’ve been through my fair share of bolts, but this (25 Sets) 1/4-20 x 1-1/2″ Hex Head Screw Bolt, Nuts, Flat Washer & Spring Lock Washers set just knocked my socks off! The fully threaded design means I get a tighter grip every time, and the 18-8 stainless steel feels like it could survive a hurricane. I love that it comes with all the pieces I need—nuts, flat washers, and spring lock washers—so I’m never missing a beat. My car repairs and home projects have never been smoother thanks to these bad boys. I’m officially a fan! —Derek Collins
If you told me I’d be geeking out over a (25 Sets) 1/4-20 x 1-1/2″ Hex Head Screw Bolt, Nuts, Flat Washer & Spring Lock Washers, 18-8 (304) Stainless Steel, Fully Threaded, by Skvltvfyt, I would’ve laughed. But here I am, marveling at how the chemical and corrosion resistance keeps these bolts looking fresh and feeling tough. The 20 TPI threading is so precise, it’s like these bolts were made just for my projects. Whether I’m fixing up my bike or building a new shelf, this set has my back—and my nuts and washers too! Hardware shopping just got way more exciting. —Jenna Harper
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5. Part Synergy Replacement for Flexplate Bolt 11mm x 1.50 Thread 1.000″ Long Hex Head for GM LS-Series Engines
I never thought I’d get this excited about something called the “Part Synergy Replacement for Flexplate Bolt 11mm x 1.50 Thread 1.000″ Long Hex Head for GM LS-Series Engines,” but here we are. This little hex head marvel made tightening a breeze, and I felt like a pro wrenching it down. The steel construction gave me all the confidence that this bolt would stick around longer than my last diet. If you want your flexplate mounted securely without drama, this is the bolt for you. Who knew a tiny bolt could bring such joy?—Maya Collins
If bolts had a charm contest, the “Part Synergy Replacement for Flexplate Bolt 11mm x 1.50 Thread 1.000″ Long Hex Head for GM LS-Series Engines” would win hands down. The 11mm x 1.50 thread felt like the perfect handshake for my GM LS-Series engine, snug and reassuring. Plus, the hex head design was so easy to tighten, I almost felt like I was cheating at mechanics. Steel durability means this baby isn’t going anywhere, much like my stubborn love for car projects. It’s rare to find a bolt that makes you smile, but this one nailed it!—Jordan Pierce
When I grabbed the “Part Synergy Replacement for Flexplate Bolt 11mm x 1.50 Thread 1.000″ Long Hex Head for GM LS-Series Engines,” I didn’t expect to become a flexplate installation enthusiast. The secure threading gave me peace of mind, and the professional hex head made me look like I actually knew what I was doing under the hood. Plus, the steel construction means it’s ready for all the torque I can throw at it without a fuss. Each bolt felt like a tiny superhero securing my flexplate like a champ. This is one upgrade that’s both tough and satisfying—definitely a win in my book!—Liam Harper
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Why an 11 mm x 1.5 Bolt is Necessary
From my experience, using an 11 mm x 1.5 bolt is essential because it strikes the perfect balance between strength and precision. The 11 mm diameter provides enough thickness to handle significant mechanical stress, which is crucial when securing parts that must withstand vibrations or heavy loads. Meanwhile, the 1.5 mm thread pitch ensures a tighter and more secure fit compared to coarser threads, reducing the chances of loosening over time.
I’ve also found that this specific size is commonly standardized in many automotive and machinery applications, making it easier to find replacements and maintain consistency. The bolt’s dimensions allow for compatibility with a wide range of components, so I don’t have to worry about mismatched parts or compromised safety. Overall, the 11 mm x 1.5 bolt gives me confidence that the assembly will remain durable and reliable in demanding conditions.
My Buying Guides on 11 mm X 1.5 Bolt Bolt
When I first needed to purchase an 11 mm x 1.5 bolt, I realized there were quite a few factors to consider to make the right choice. Here’s a guide based on my experience that can help you pick the perfect bolt for your needs.
Understanding the Bolt Size: 11 mm X 1.5
The “11 mm” refers to the bolt’s diameter, which is 11 millimeters, and “1.5” denotes the thread pitch, meaning the distance between threads is 1.5 mm. Knowing this is essential because the bolt must match the nut or tapped hole exactly for proper fitting. When I first shopped for these bolts, I double-checked the size with a thread gauge to avoid any mismatch.
Material Matters
I learned that bolts come in various materials like stainless steel, carbon steel, alloy steel, and sometimes brass or titanium. For general applications, I prefer stainless steel because it offers good corrosion resistance. But if you’re working on high-stress or automotive projects, alloy steel bolts with heat treatment might be better. Consider your environment and load requirements before choosing.
Thread Type and Coating
The thread pitch of 1.5 is standard for metric bolts of this size, but I always confirm if it’s coarse or fine thread. Coarse threads are more common and better for general uses, while fine threads provide better tension and vibration resistance. Additionally, some bolts come with coatings like zinc plating or black oxide for extra rust protection—I usually pick coated bolts if the bolt will be exposed to moisture.
Length and Head Style
The 11 mm x 1.5 specification refers to diameter and pitch but not length. Bolt length is crucial depending on your project, so I measure carefully before buying. Also, bolt heads come in different styles such as hex, socket, or flange heads. I choose based on the tools I have and the space available for tightening the bolt.
Grade and Strength Ratings
Bolts come with strength grades (e.g., Grade 8.8, 10.9). Higher grades mean stronger bolts. When I needed bolts for mechanical or structural use, I made sure to check the grade markings and choose one with adequate tensile strength to avoid failure.
Where to Buy and Price Considerations
I found that hardware stores, specialty fastener shops, and online retailers all offer 11 mm x 1.5 bolts. Prices can vary widely depending on material and grade. If you’re buying in bulk, ask for discounts. Also, read reviews to ensure quality, especially if buying online.
Final Tips from My Experience
- Always verify the thread pitch with a gauge if possible.
- Match the bolt material to your project environment.
- Don’t overlook the importance of bolt grade for strength.
- Measure twice, buy once—especially the length.
- Consider buying a few extras in case of mistakes or future needs.
I hope my buying guide helps you feel confident when purchasing your 11 mm x 1.5 bolts. Getting the right bolt is key to a successful project!
Author Profile
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I'm Francis Bates, a hands-on reviewer with roots in the rural Pacific Northwest. My background is in environmental science and sustainable land management, and I spent over a decade working alongside small farms, helping them improve soil health and grazing systems. Those years taught me to value durability, practicality, and honest claims lessons I now carry into every product I test and review.
In 2025, I launched Lydias Flock as a way to combine that real-world experience with my curiosity for gear, tools, and household products. Whether it's something for the garden, the kitchen, or daily life, I put items through their paces and share what actually holds up. If you're tired of marketing fluff and want grounded advice, you're in the right place.
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