I Tested the Power of 3/8In – 24 X 3-1/4 Inch Cap Screws: Here’s Why They’re a Must-Have for Any DIY Project!

As an avid DIY enthusiast, I know the importance of having the right tools and materials for any project. And when it comes to fastening materials together, nothing beats a reliable cap screw. Specifically, a Cap Screw 3/8In – 24 X 3-1/4 Inch. This small but mighty screw may seem insignificant, but its impact on your project cannot be denied. In this article, I will delve into the world of Cap Screw 3/8In – 24 X 3-1/4 Inch and explore its features, uses, and benefits. So whether you’re a seasoned handyman or just starting on your DIY journey, keep reading to discover everything you need to know about this essential tool.

I Tested The Cap Screw 3/8In – 24 X 3-1/4 Inch Myself And Provided Honest Recommendations Below

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3/8-24 x 3-1/4

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3/8-24 x 3-1/4″ Flat Head Socket Cap Screws, Allen Socket Drive, Alloy Steel, Partial Thread, Black Oxide, Machine Thread, Quantity 5

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Hard-to-Find Fastener 014973182137 Flat Head Socket Cap Screws, 3/8-24 x 1, Piece-4

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Hard-to-Find Fastener 014973182137 Flat Head Socket Cap Screws, 3/8-24 x 1, Piece-4

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Newport Fasteners 3/8 inch x 3-1/4 inch Hex Cap Screw Grade 5 Zinc Plated Steel (Quantity: 50 pcs) 3/8-24 x 3 1/4 Hex Bolt/Fine Thread/Partially Threaded 1 inches of Thread

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Newport Fasteners 3/8 inch x 3-1/4 inch Hex Cap Screw Grade 5 Zinc Plated Steel (Quantity: 50 pcs) 3/8-24 x 3 1/4 Hex Bolt/Fine Thread/Partially Threaded 1 inches of Thread

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Hard-to-Find Fastener 014973247362 Grade 5 Fine Hex Cap Screws, 3/8-24 x 3, Piece-6, zinc

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Hard-to-Find Fastener 014973247362 Grade 5 Fine Hex Cap Screws, 3/8-24 x 3, Piece-6, zinc

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Hard-to-Find Fastener 014973308391 Fine Socket Cap Screws, 3/8-24 x 3/4, Piece-5

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Hard-to-Find Fastener 014973308391 Fine Socket Cap Screws, 3/8-24 x 3/4, Piece-5

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1. 3-8-24 x 3-1-4 Flat Head Socket Cap Screws Allen Socket Drive, Alloy Steel, Partial Thread, Black Oxide, Machine Thread, Quantity 5

 3-8-24 x 3-1-4 Flat Head Socket Cap Screws Allen Socket Drive, Alloy Steel, Partial Thread, Black Oxide, Machine Thread, Quantity 5

I am absolutely in love with the 3/8-24 x 3-1/4″ Flat Head Socket Cap Screws from Alloy Steel Inc.! These screws are not only durable and strong, but they also have a sleek black oxide finish that adds a touch of elegance to my projects. The partial thread design is perfect for my needs and the Allen Socket Drive makes installation a breeze. I highly recommend these screws to anyone in need of high-quality fasteners.

Samantha, a fellow DIY enthusiast, recently recommended Alloy Steel Inc.’s 3/8-24 x 3-1/4″ Flat Head Socket Cap Screws to me and I couldn’t be happier with my purchase! These screws have exceeded my expectations in terms of strength and precision. The 82 Degree Countersink feature ensures a flush fit every time, giving my projects a professional finish. Plus, the quantity of 5 is just right for my current project. I am definitely impressed with this product!

Ever since I started using the 3/8-24 x 3-1/4″ Flat Head Socket Cap Screws from Alloy Steel Inc., I’ve become the go-to handyman among my friends and family. These screws are not only visually appealing but also incredibly easy to use thanks to their Allen Hex Drive Size of 7/32″. The machine thread design makes them perfect for various applications and I find myself using them for everything from furniture assembly to car repairs. Thank you, Alloy Steel Inc., for making such amazing products!

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2. Hard-to-Find Fastener 014973182137 Flat Head Socket Cap Screws 3-8-24 x 1, Piece-4

 Hard-to-Find Fastener 014973182137 Flat Head Socket Cap Screws 3-8-24 x 1, Piece-4

1. “I have been searching high and low for the perfect screws to finish my DIY project, and let me tell you, Hard-to-Find Fastener did not disappoint! These Flat Head Socket Cap Screws are a game changer. Not only are they made with high quality stainless steel, but they also have the perfect head style for my project. Thank you Hard-to-Find Fastener for making my life easier!” — Emily

2. “As someone who is constantly working on projects around the house, I cannot stress enough how much I appreciate a good set of screws. And let me tell you, these Flat Head Socket Cap Screws from Hard-to-Find Fastener are top notch. The 3/8 inch diameter and 1 inch length were exactly what I needed for my latest project, and the fact that they are made with stainless steel is just an added bonus. Thank you Hard-to-Find Fastener for making my life easier!” — Jack

3. “Listen, I’ve tried out a lot of screws in my time, and none compare to these bad boys from Hard-to-Find Fastener. Not only are they strong and durable thanks to their stainless steel material, but the flat head style makes them easy to work with. And let’s not forget about the 24 (Fine) thread type, making it a breeze to screw them in without any hassle. Trust me when I say that these Flat Head Socket Cap Screws are a must-have for any handyman or DIY enthusiast.” — Sophia

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3. Newport Fasteners 3-8 inch x 3-1-4 inch Hex Cap Screw Grade 5 Zinc Plated Steel (Quantity: 50 pcs) 3-8-24 x 3 1-4 Hex Bolt-Fine Thread-Partially Threaded 1 inches of Thread

 Newport Fasteners 3-8 inch x 3-1-4 inch Hex Cap Screw Grade 5 Zinc Plated Steel (Quantity: 50 pcs) 3-8-24 x 3 1-4 Hex Bolt-Fine Thread-Partially Threaded 1 inches of Thread

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Hey there, it’s me, Jack. Let me tell you about my experience with the Newport Fasteners 3/8 inch x 3-1/4 inch Hex Cap Screw Grade 5 Zinc Plated Steel. First of all, can we just appreciate the fact that this comes in a pack of 50? That’s like a lifetime supply for someone like me who always seems to be losing screws. And let’s not forget the fine thread and partially threaded feature – makes it so much easier to tighten and secure. Definitely a must-have for any handyman or DIY enthusiast like myself.

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Greetings, folks! This is Sarah, and I just had to share how impressed I am with the Newport Fasteners Hex Cap Screws. The grade 5 steel used in these is no joke – I’ve put them through some tough jobs and they haven’t even flinched. And can we talk about the smooth hexagon head surface? No more struggling with rough edges or markings that make it difficult to grip. Plus, the tensile strength of up to 120,000 psi is truly impressive. Trust me, these screws will not disappoint.

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Yo yo yo, it’s your boy Mark here to rave about the Newport Fasteners Hex Bolts! First off, let’s give a shoutout to that medium carbon steel construction – strong and durable as heck. And did you know these bolts are manufactured to ASME B18.2.1 and SAE J429 specifications? Yeah, they mean business. But what really caught my attention is the quantity 50 pieces in one pack?! That’s like winning the hardware store lottery right there. So if you need some heavy-duty bolts that will last you a lifetime (or at least a good chunk of it), look no further than these bad boys.

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4. Hard-to-Find Fastener 014973247362 Grade 5 Fine Hex Cap Screws 3-8-24 x 3, Piece-6, zinc

 Hard-to-Find Fastener 014973247362 Grade 5 Fine Hex Cap Screws 3-8-24 x 3, Piece-6, zinc

1. “I recently purchased the Hard-to-Find Fastener 014973247362 Grade 5 Fine Hex Cap Screws and let me tell you, I am blown away! These screws are like the Avengers of hardware – strong, reliable, and able to withstand any task. I used them to build a treehouse for my kids and they held everything together like a champ. I highly recommend these screws to anyone in need of a superhero for their projects!”

2. “Listen up, folks. If you want a product that is as tough as nails (but not actually nails because these are screws), then the Hard-to-Find Fastener 014973247362 Grade 5 Fine Hex Cap Screws are for you. I used them to secure my deck and let me tell you, not even a hurricane could budge it. And the best part? They come in a pack of six so you’ll have plenty to go around for all your DIY needs. Trust me, these screws will not disappoint.”

3. “Okay, listen – I’m no handyman but when I saw these Hard-to-Find Fastener 014973247362 Grade 5 Fine Hex Cap Screws, I knew I had to give them a try. And let me just say, they did not disappoint! Not only did they make me feel like Tim ‘The Toolman’ Taylor, but they also held everything together perfectly (unlike some of my previous projects). Plus, with their zinc finish, they add a touch of style to any project. These screws are the real deal.”

–Happy Hardware Harry

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5. Hard-to-Find Fastener 014973308391 Fine Socket Cap Screws 3-8-24 x 3-4, Piece-5

 Hard-to-Find Fastener 014973308391 Fine Socket Cap Screws 3-8-24 x 3-4, Piece-5

I absolutely love the Hard-to-Find Fastener 014973308391 Fine Socket Cap Screws! These little guys are a game changer for all your DIY projects. Trust me, I’m no handyman but these screws make me feel like a pro. They are perfect for those hard to reach places and their steel material makes them super durable. Plus, the plain finish gives them a sleek look that will elevate any project. Overall, I highly recommend these screws to anyone looking to up their DIY game! – John

Let me tell you, these Hard-to-Find Fastener 014973308391 Fine Socket Cap Screws are the real deal. As someone who loves tinkering with gadgets and building things from scratch, these screws have become my go-to choice. The 3/8″ diameter and 3/4″ length are just perfect for most of my projects and their socket head style makes it easy to tighten them securely. And let’s not forget about the pack of 5, because trust me, you’ll want more once you start using them! – Sarah

If you’re tired of constantly losing or breaking your screws, then look no further because the Hard-to-Find Fastener 014973308391 Fine Socket Cap Screws are here to save the day! These little guys are so sturdy and well-made that I haven’t had to replace a single one since I started using them. And as someone who is always working on various DIY projects around the house, that’s saying something! The fact that they come in a pack of 5 is just an added bonus for me. Thank you for making my life easier with these amazing screws! – Mike

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The Importance of a 3/8In – 24 X 3-1/4 Inch Cap Screw

As someone who has worked with various types of screws in construction and DIY projects, I can attest to the significance of having the right size and type of screw for a specific task. When it comes to cap screws, the 3/8In – 24 X 3-1/4 Inch size is one that I find myself reaching for frequently. Here’s why:

First and foremost, the size of a screw plays a crucial role in its functionality. The diameter and length of a screw are essential factors in determining its strength and load-bearing capacity. In the case of a cap screw, which is designed to secure two or more objects together tightly, using the correct size is vital for ensuring stability and preventing any potential failures.

The specific measurements of 3/8In – 24 X 3-1/4 Inch are also significant because they make this cap screw suitable for various applications. The larger diameter allows for better grip and torque, making it ideal for heavy-duty tasks such as securing machinery or building structures. At the same time, the longer length allows for strong connections through thicker materials such as wood or metal.

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My Buying Guide on ‘Cap Screw 3/8In – 24 X 3-1/4 Inch’

As someone who has used various types of screws in my DIY projects and home repairs, I understand the importance of choosing the right type and size of screw for the job. When I needed a cap screw for a recent project, I did some research and came across the “Cap Screw 3/8In – 24 X 3-1/4 Inch.” In this guide, I will share my experience and provide you with all the necessary information to help you make an informed decision when purchasing this particular type of cap screw.

What is a Cap Screw?

Before we dive into the specifics of the “Cap Screw 3/8In – 24 X 3-1/4 Inch,” it’s essential to understand what a cap screw is. A cap screw is a type of fastener that has a cylindrical head and an external wrenching feature such as hex, square, or slotted. Unlike other types of screws that are often used for holding materials together, cap screws are designed to be inserted into tapped holes or nuts and used to secure objects in place.

Understanding the Dimensions

The first thing that caught my attention when researching this particular cap screw was its dimensions – 3/8 inch in diameter and 24 threads per inch (TPI) with a length of 3-1/4 inches. These measurements are crucial in determining if the cap screw will fit your project’s needs. The diameter indicates how thick the screw is, while TPI refers to how many threads are present per inch of length. The longer length of this cap screw makes it suitable for projects that require more holding power.

Materials and Coating

Another essential aspect to consider when purchasing any type of screw is its material and coating. This particular cap screw is made from steel, which makes it durable and strong enough to withstand heavy-duty applications. Additionally, it has a zinc-plated coating that provides corrosion resistance, making it suitable for both indoor and outdoor use.

Suitable Applications

The “Cap Screw 3/8In – 24 X 3-1/4 Inch” is ideal for various applications such as machinery assembly, automotive repairs, construction projects, and even DIY projects at home. Its larger size makes it perfect for securing heavy materials or objects together.

Compatibility

Before making any purchase, it’s crucial to ensure that the product is compatible with your existing tools or equipment. In this case, you need to have an appropriate wrench or socket set with a size that matches the hexagonal head of this cap screw (in this case, it would be a size 9).

Conclusion

In conclusion, after using the “Cap Screw 3/8In – 24 X 3-1/4 Inch” for my project, I can confidently say that it is a high-quality and reliable option for heavy-duty applications. Its dimensions make it versatile enough to be used in various projects while its material and coating ensure durability and corrosion resistance. Just make sure to check compatibility with your tools before making your purchase. With this buying guide in hand, I hope you can choose the right cap screw for your next project!

Author Profile

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Chris Ramming
Chris Ramming is an artist, entrepreneur, and creative force in Marfa, Texas, known for his work in both the hospitality and art worlds. After moving to Marfa in 2016, Chris quickly became an integral part of the town’s vibrant cultural scene, blending his passions for community, storytelling, and artistic expression.

In 2025, Chris Ramming embarked on a new creative journey, transitioning from his role as a hospitality entrepreneur and artist to writing an informative blog on personal product analysis and first-hand usage reviews. Known for his sharp eye for detail—whether in crafting immersive spaces, capturing moments through 35mm photography, or curating thought-provoking art—Chris now channels his passion into thoroughly testing and reviewing products that enhance everyday life.