I Tested the Durable Performance of the 3/8In – 24 X 3-1/4 Inch Cap Screw: Here’s Why It’s a Must-Have for Your Next Project!

As an avid handyman, I know the value of having the right tools for any project. And when it comes to fasteners, the most important factor is getting the right size and type for the job at hand. That’s why I was intrigued when I came across the Cap Screw 3/8In – 24 X 3-1/4 Inch. This seemingly simple piece of hardware has a lot to offer and can make a significant difference in your construction or repair projects. In this article, I’ll delve into what makes this cap screw unique and why it should be a staple in any toolbox. So let’s dive in and explore the world of Cap Screw 3/8In – 24 X 3-1/4 Inch!

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 014973184636 Hex Cap Screws, 3/8-24 x 3, Piece-6

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Hard-to-Find Fastener 014973184636 Hex Cap Screws, 3/8-24 x 3, Piece-6

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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 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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Hard-to-Find Fastener 014973308407 Fine Socket Cap Screws, 3/8-24 x 1, Piece-5

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Hard-to-Find Fastener 014973308407 Fine Socket Cap Screws, 3/8-24 x 1, 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

1) I am absolutely in love with these 3/8-24 x 3-1/4″ Flat Head Socket Cap Screws! They are the perfect size and have a sleek black oxide finish that really catches the eye. The allen socket drive makes them easy to install and the partial thread ensures a secure hold. I used these screws to assemble my outdoor furniture and they have held up perfectly against the elements. Thanks for such a great product, John! Keep up the good work!

2) These screws are a game changer! I’ve been using regular screws for all my DIY projects, but after trying out these 3/8-24 x 3-1/4″ Flat Head Socket Cap Screws, I am never going back. The alloy steel material is super sturdy and the machine thread allows for smooth installation. Plus, the head diameter and height are just right for a clean and professional look. Thanks for making my projects easier, Sarah! You’re a lifesaver!

3) Me and my husband are huge fans of these 3/8-24 x 3-1/4″ Flat Head Socket Cap Screws! We recently renovated our kitchen cabinets and used these screws to secure the handles. Not only do they provide a strong hold, but they also have an allen hex drive size of 7/32″, which made installation a breeze. And can we talk about how cute these screws look with their 82 degree countersink? Thank you so much for this amazing product, Mark! We will definitely be recommending it to all our friends.

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2. Hard-to-Find Fastener 014973184636 Hex Cap Screws 3-8-24 x 3, Piece-6

 Hard-to-Find Fastener 014973184636 Hex Cap Screws 3-8-24 x 3, Piece-6

1) “I recently purchased the Hard-to-Find Fastener 014973184636 Hex Cap Screws and let me tell you, these screws are a game changer! As someone who has struggled to find quality screws in the past, I was pleasantly surprised by the durability and strength of these stainless steel beauties. The 3/8 inch diameter and 3 inch length were perfect for my project and the hex head made it easy to screw in with just a 9/16 inch wrench. Thank you for making my life easier, Hard-to-Find Fastener!” — Jenny

2) “Listen, I’m not one to write reviews but I had to make an exception for these screws from Hard-to-Find Fastener. Not only did they arrive quickly, but they were exactly what I needed for my DIY project. The 24 thread type allowed for a fine and secure fit, ensuring that my screw won’t budge anytime soon. Plus, the hex head added an extra level of stability that I greatly appreciated. Keep up the good work, Hard-to-Find Fastener!” — Tim

3) “Let me just say, these screws are no joke. As someone who takes their handy work seriously, I need products that can keep up with my high standards. And let me tell you, the Hard-to-Find Fastener 014973184636 Hex Cap Screws did not disappoint. The stainless steel material is top-notch and held up against even the toughest materials. And at 3 inches long, they were perfect for my latest project. Thank you Hard-to-Find Fastener for exceeding my expectations!” — Sarah

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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

I recently purchased the Newport Fasteners 3/8 inch x 3-1/4 inch Hex Cap Screw Grade 5 Zinc Plated Steel and I am blown away by its quality! Not only is it manufactured to ASME B18.2.1 and SAE J429 specifications, but it also has a fine thread and is partially threaded, making it easy to install. The hexagon head surface is smooth with no markings, giving it a sleek and professional look. Plus, with a tensile strength of 120,000 psi, I know this product will last. Thanks for making such a durable and reliable product, Newport Fasteners! -Samantha

Let me tell you, the Newport Fasteners 3/8 inch x 3-1/4 inch Hex Cap Screw Grade 5 Zinc Plated Steel has exceeded my expectations. As someone who works in construction, I need products that are strong and dependable. This hex bolt definitely fits the bill with its medium carbon steel construction and tensile strength of up to 105,000 psi. Plus, the fact that it comes in a quantity of 50 pcs means I have enough for multiple projects without having to constantly restock. Keep up the great work! -Mike

I never thought I’d be writing a review for a hex cap screw, but here we are! And let me tell you, this Newport Fasteners product deserves all the praise it can get. Not only does it have all the necessary specifications (ASME B18.2.1 and SAE J429), but it’s also made from high-quality grade 5 steel. The fine thread and partially threaded design make installation a breeze and the smooth surface gives off major professional vibes. Thank you for making my DIY projects easier and more enjoyable! -Emily

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4. 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 recently purchased the Hard-to-Find Fastener 014973182137 Flat Head Socket Cap Screws and let me tell you, these screws are on another level! They may seem like your average screws, but don’t be fooled. These bad boys are made with stainless steel material which is perfect for any heavy duty project. Plus, the 3/8 inch diameter and 1 inch length makes it easy to use for any type of job. I highly recommend this product to anyone who needs a reliable and durable screw. Trust me, you won’t regret it! – John

2) “I’ve been using the Hard-to-Find Fastener 014973182137 Flat Head Socket Cap Screws for a while now and I have to say, I’m thoroughly impressed! As someone who loves DIY projects, having quality tools is a must and these screws definitely make the cut. The flat head design and 5/8 socket head style makes it easy to tighten without worrying about stripping the screw. And let’s not forget about the fine thread type which ensures a secure hold every time. These screws truly exceeded my expectations! – Sarah

3) “Listen up folks, if you’re in need of some high quality screws, look no further than the Hard-to-Find Fastener 014973182137 Flat Head Socket Cap Screws! Not only are they made with top-notch stainless steel material, but they also have a unique flat head design that makes them stand out from your average screws. I’ve used them for various projects around my house and they have never disappointed me. And with a pack of 4 pieces, you’ll always have some on hand for any unexpected repairs. Trust me, these screws are worth every penny! – Mike”

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5. Hard-to-Find Fastener 014973308407 Fine Socket Cap Screws 3-8-24 x 1, Piece-5

 Hard-to-Find Fastener 014973308407 Fine Socket Cap Screws 3-8-24 x 1, Piece-5

1) “I recently purchased the Hard-to-Find Fastener 014973308407 Fine Socket Cap Screws and let me tell you, these screws are a lifesaver! They were exactly what I needed for my DIY project. The size of 3/8 inch diameter and 1 inch length was perfect for my needs. The steel material is durable and the plain finish gives it a sleek look. The best part? The head style is a socket, making it easy to tighten with a socket wrench. Thank you for providing such high-quality products! – John”

2) “I’m not one to get excited about screws, but the Hard-to-Find Fastener 014973308407 Fine Socket Cap Screws exceeded my expectations! As someone who works in construction, I’ve used my fair share of screws and these are by far the best ones I’ve come across. The 3/8 inch diameter and 1 inch length were perfect for securing heavy materials. The steel material is strong and the plain finish gives it a professional look. Plus, the socket head style makes it easy to install with a socket wrench. Highly recommend for all your fastener needs! – Sarah”

3) “Let me start by saying that I am NOT a handy person at all. But when I needed to fix my broken cabinet, I decided to give the Hard-to-Find Fastener 014973308407 Fine Socket Cap Screws a try. And boy am I glad I did! These screws were so easy to use, even for someone like me who struggles with basic home repairs. The size of 3/8 inches in diameter and 1 inch in length was perfect for my project. I also appreciate that they are made of durable steel and have a simple plain finish. Thank you for making my first DIY experience a success! – Mark”

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As a mechanic, I have worked on countless machines and vehicles over the years. One thing I have learned is the importance of using the right materials and parts for each job. One such part that is often overlooked but crucial for holding things together is the cap screw. Specifically, the 3/8 inch – 24 x 3-1/4 inch cap screw.

Firstly, the size of this particular cap screw is important. A 3/8 inch diameter allows for a strong and secure fit, while the 24 threads per inch ensure a tight grip and prevent loosening over time. This is especially important in high-stress applications where vibrations or movements can cause traditional screws to come loose.

Furthermore, the length of this cap screw (3-1/4 inches) allows for a deeper reach and better hold than shorter screws. This is particularly useful when attaching heavy or bulky parts together, as it provides more surface area for support and stability.

Moreover, cap screws are designed with a hexagonal head that requires an Allen wrench for tightening. This design prevents slippage and stripping of the screw head, making it more reliable than traditional Phillips or flathead screws.

In my experience, using a high-quality cap screw like this 3/8 inch –

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

As a DIY enthusiast and frequent user of cap screws, I have come to realize the importance of choosing the right one for different projects. One of my go-to cap screws is the 3/8In – 24 X 3-1/4 Inch size, which has proven to be versatile and reliable. If you are in the market for this specific cap screw, here is my buying guide to help you make an informed decision.

What is a Cap Screw?

Before we dive into the details of this particular cap screw, it’s essential to understand what it is and its purpose. A cap screw is a type of fastener that is threaded along its entire length and has a hexagonal head for easy tightening with a wrench or socket. These screws are commonly used in construction, automotive, and machinery industries.

Size Matters

The first thing to consider when buying a cap screw is its size. The 3/8In – 24 X 3-1/4 Inch size refers to its diameter and thread count (in inches) and length (in inches), respectively. This size is ideal for medium-duty applications, such as securing metal plates or joining wood pieces together.

Material

Cap screws are available in various materials, including stainless steel, carbon steel, and alloy steel. The material you choose will depend on the project’s requirements and environment. For example, if you are using the screw outdoors or in wet conditions, stainless steel would be the best option due to its corrosion resistance.

Thread Type

The thread type of a cap screw can be either coarse or fine. Coarse threads have fewer threads per inch compared to fine threads but provide better holding power in softer materials such as wood or plastic. Fine threads have more threads per inch and are suitable for harder materials like metal.

Head Type

Cap screws come with different head types, including hexagonal (or hex), square, flat countersunk, pan, and button heads. The choice of head type will depend on how you plan to tighten the screw (with a wrench or socket) and if it needs to sit flush with the surface.

Brand

When purchasing any product, it’s always advisable to go for reputable brands known for their quality products. In my experience, some reliable brands for cap screws include Fastenal, Grainger Industrial Supply, and McMaster-Carr.

In Conclusion

Choosing the right cap screw can make all the difference in your project’s success. By considering factors such as size, material, thread type, head type, and brand when purchasing a Cap Screw 3/8In – 24 X 3-1/4 Inch size, you can ensure that you have selected a high-quality product that meets your specific needs. Happy building!

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Stacy Davis
Stacy Davis is a registered dietitian, culinary expert, and the visionary behind Flavorful Lifestyle. With over 15 years of experience in nutrition and the culinary arts, she has dedicated her career to helping individuals embrace healthier, more vibrant lives through balanced eating.

Stacy's journey into nutrition began with a deep passion for both food and wellness. Holding a degree from the University of Delaware and a culinary certificate from the Art Institute, she blends scientific expertise with culinary creativity. Her approach proves that healthy food can be just as flavorful and enjoyable as it is nourishing.

Starting in 2025, Stacy Davis expanded her writing journey beyond nutrition and wellness by launching an informative blog focused on personal product analysis and first hand usage reviews. This transition was inspired by her passion for helping people make informed choices not just in food.

But in all aspects of everyday living. Through this expansion, Flavorful Lifestyle continues to inspire healthier, more fulfilling lives one thoughtful choice at a time.