Have you ever found yourself staring at a hex head screw, wondering what size it is and how to replace it? We’ve all been there. Hex head screws are commonly used in various applications and can come in a range of sizes, making it difficult to know which one to use. But don’t worry, we’ve got your back.
In this blog post, we’ll provide you with a handy hex head screw size chart to help you identify the correct size screw you need for your project. So, grab a cup of coffee and let’s dive in!
Hex Head Screw Size Chart
| Nominal or Basic Product Diameter Click on the size to shop products | Body Diameter (E) | Width Across Flats (F) | Width Across Corners (G) | Head Height (H) | Thread Length (LT) | ||||||||
| Max | Min | Basic | Max | Min | Max | Min | Basic | Max | Min | <or=6″ | >6″ | ||
| 1/4 | .2500 | .2500 | .2450 | 7/16 | .438 | .428 | .505 | .488 | 5/32 | .163 | .150 | .750 | 1.000 |
| 5/16 | .3125 | .3125 | .3065 | 1/2 | .500 | .489 | .577 | .557 | 13/64 | .211 | .195 | .875 | 1.125 |
| 3/8 | .3750 | .3750 | .3690 | 9/16 | .562 | .551 | .650 | .628 | 15/64 | .243 | .226 | 1.000 | 1.250 |
| 7/16 | .4375 | .4375 | .4305 | 5/8 | .625 | .612 | .722 | .698 | 9/32 | .291 | .272 | 1.125 | 1.375 |
| 1/2 | .5000 | .5000 | .4930 | 3/4 | .750 | .736 | .866 | .840 | 5/16 | .323 | .302 | 1.250 | 1.500 |
| 9/16 | .5625 | .5625 | .5545 | 13/16 | .812 | .798 | .938 | .910 | 23/64 | .371 | .348 | 1.375 | 1.625 |
| 5/8 | .6250 | .6250 | .6170 | 15/16 | .938 | .922 | 1.083 | 1.051 | 25/64 | .403 | .378 | 1.500 | 1.750 |
| 3/4 | .7500 | .7500 | .7410 | 1-1/8 | 1.125 | 1.100 | 1.299 | 1.254 | 15/32 | .483 | .455 | 1.750 | 2.000 |
| 7/8 | .8750 | .8750 | .8660 | 1-5/16 | 1.312 | 1.285 | 1.516 | 1.465 | 35/64 | .563 | .531 | 2.000 | 2.250 |
| 1 | 1.0000 | 1.0000 | .9900 | 1-1/2 | 1.500 | 1.469 | 1.732 | 1.675 | 39/64 | .627 | .591 | 2.250 | 2.500 |
| 1-1/8 | 1.1250 | 1.1250 | 1.1140 | 1-11/16 | 1.688 | 1.631 | 1.949 | 1.859 | 11/16 | .718 | .658 | 2.500 | 2.750 |
| 1-1/4 | 1.2500 | 1.2500 | 1.2390 | 1-7/8 | 1.875 | 1.812 | 2.162 | 2.066 | 25/32 | .813 | .749 | 2.750 | 3.000 |
| 1-1/2 | 1.5000 | 1.5000 | 1.4880 | 2-1/4 | 2.250 | 2.175 | 2.598 | 2.480 | 1-5/16 | .974 | .902 | 3.250 | 3.500 |
| Hex Cap Screws : Tolerance on Length | |||||||
|---|---|---|---|---|---|---|---|
| Nominal Screw Size | Nominal Screw Length | ||||||
| Up to 1″ | Over 1″ – 2-1/2″ | Over 2-1/2″ – 4″ | Over 4″ – 6″ | Longer than 6″ | |||
| 1/4 – 3/8 | -.03 | -.04 | -.06 | -.10 | -.18 | ||
| 7/16 & 1/2 | -.03 | -.06 | -.08 | -.10 | -.18 | ||
| 9/16 – 3/4 | -.03 | -.08 | -.10 | -.10 | -.18 | ||
| 7/8 and 1 | – | -.10 | -.14 | -.16 | -.20 | ||
| 1-1/8 – 1-1/2 | – | -.12 | -.16 | -.18 | -.22 | ||
| Hex Cap Screws : Performance & Mechanical Stats | ||||||
|---|---|---|---|---|---|---|
Grade 2 | Grade 5 | Grade 8 | Stainless Steel 18-8 | Stainless Steel 316 | ||
| Applications | Non-critical applications, economical | Greater tensile strength than Grade 2, Yield to tensile ratio is the lowest of all heat treated steels. | High stress applications | General corrosion resistance such as chemical or food-processing equipment | Greater corrosion resistance, strength and temperature | |
| Material | Low or medium carbon steel. AISI – 1006-1050 | Medium carbon steel (or alloy), heat treated | Medium carbon alloy steel, heat treated | Austenitic alloys: 303, 303Se, 304, XM7 (chromium 17-19% and nickel content 8-10%) | 316 Stainless Steel (Molybdenum content 2-3% and nickel content 10-14%) | |
| Heat Treatment | N/A | Heat treated, oil or water quenched, tempered at 800 Deg (F) min. | Heat treated, oil quenched, tempered at 800 Deg (F) min. | |||
| Hardness | 1/4″-3/4″ D, Up to 6″ L: Rockwell B80-B1001/4″-3/4″ D, Over 6″ L: Rockwell B70-B1007/8″-1-1/2″ D, all lengths: Rockwell B70-B100 | See below | See below | 1/4″-5/8″ D: Rockwell B95-C323/4″-1″ D: Rockwell B80-C32 | 1/4″-5/8″ D: Rockwell B95-C3233/4″-1″ D: Rockwell B80-C32 | |
| Core Hardness | See above | 1/4″-1″ D, all lengths: Rockwell C25-C341-1/8″-1-1/2″ D, all lengths: Rockwell C19-C30 | 1/4″-1-1/2″, all lengths: Rockwell C33-C39 | See above | See above | |
| Surface Hardness | See above | 1/4″-1″ D, all lengths: Rockwell 30N54 max1-1/8″-1-1/2″ D, all lengths: Rockwell 30N50 max | 1/4″-1-1/2″ D, all lengths: Rockwell 30N58.6 max | See above | See above | |
| Proof Load | 1/4″-3/4″ D, Up to 6″ L: 55,000 psi1/4″-3/4″ D, Over 6″ L: 33,000 psi7/8″-1-1/2″ D, all lengths: 33,000 psi | 1/4″-1″ D, all lengths: 85,000 psi1-1/8″-1-1/2″ D, all lengths: 74,000 psi | 1/4″-1-1/2″ D, all lengths: 120,000 psi | |||
| Yield Strength | 1/4″-3/4″ D, Up to 6″ L: 57,000 psi min.1/4″-3/4″ D, Over 6″ L: 36,000 psi min7/8″-1-1/2″ D, all lengths: 36,000 psi min | 1/4″-1″ D, all lengths: 92,000 psi min1-1/8″-1-1/2″ D, all lengths: 81,000 psi min | 1/4″-1-1/2″ D, all lengths: 130,000 psi min | 1/4″-5/8″ D, 2.25 D and longer: 65,000 psi min3/4″ (2.25D and longer) & 7/8″-1″ D (3D and longer): 45,000 psi min | 1/4″-5/8″ D, 2.25 D and longer: 65,000 psi min3/4″ (2.25D and longer) & 7/8″-1″ D (3D and longer): 45,000 psi min | |
| Tensile Strength | 1/4″-3/4″ D, Up to 6″ L: 74,000 psi min.1/4″-3/4″ D, Over 6″ L: 60,000 psi min7/8″-1-1/2″ D, all lengths: 60,000 psi min | 1/4″-1″ D, all lengths: 120,000 psi min1-1/8″-1-1/2″ D, all lengths: 105,000 psi min | 1/4″-1-1/2″ D, all lengths: 150,000 psi min | 1/4″-5/8″ D, 2.25 D and longer: 100,000-150,000 psi3/4″ (2.25D and longer) & 7/8″-1″ D (3D and longer): 85,000-140,000 psi | 1/4″-5/8″ D, 2.25 D and longer: 100,000-150,000 psi3/4″ (2.25D and longer) & 7/8″-1″ D (3D and longer): 85,000-140,000 psi | |
| Elongation | 18% min | 14% min | 12% min | 4D – 1/4″-5/8″ D: 20% min, 3/4″-1″ D: 25% min | 4D – 1/4″-5/8″ D: 20% min, 3/4″-1″ D: 25% min | |
| Reduction of Area | 35% min | 35% min | 35% min | |||
What is a hex head screw?
A hex head screw, also known as a hex bolt or hex cap screw, is a fastener with a hexagonal or six-sided head. This type of screw is typically used in construction, automotive, and machinery applications where high torque is required. The hexagonal shape of the head makes it easier to apply force using a wrench or pliers for tightening or loosening.
Hex head screws are available in various sizes, lengths, and materials to suit specific needs. They are preferred for their durability, strength, and resistance to corrosion. If you’re looking for a reliable and sturdy fastener for your project, a hex head screw might be the perfect choice.
Why is screw size important?
Screw size is a crucial consideration when it comes to construction, DIY projects, and repairs. It may seem like a minor detail, but using the wrong size screw can lead to a wide range of problems, such as instability, poor durability, and even safety hazards. Choosing the right size screw is not just about length, but also about diameter and thread pitch.
Using a screw that is too short or too long can compromise the strength of the connection, while using a screw that is too wide or too narrow can result in a stripped or loose hole. Therefore, understanding the basics of screw sizing is essential for any DIY enthusiast or professional contractor. By getting the right screw size, you can ensure your project’s success and longevity.
Types of Hex Screws
Are you in need of a hex head screw size chart? When it comes to hex screws, there are several types that come in a range of sizes. Hex screws can be classified based on their threading, length, width, and material. Some of the commonly used hex screws include hex cap screws, hex tap bolts, and hex machine screws.
Hex cap screws are typically referred to as bolts and are commonly used in construction and machinery. Hex tap bolts are a type of hex screw that has threading along its entire length, while hex machine screws have threading only at the tip. The size of these screws can also vary depending on their intended use.
It’s important to refer to a hex head screw size chart to ensure you have the correct size for your project. So, next time you’re in need of a hex screw, check out a size chart to make sure you’re getting the right one for your project.
Stainless Steel Hex Head Screws
Stainless Steel Hex Head Screws come in many different types, each with their own unique features and benefits. Some of the most popular types include fully threaded hex screws, partially threaded hex screws, and oversized hex screws. Fully threaded hex screws are used when maximum grip and holding power is required, while partially threaded hex screws are ideal for attaching materials to one another without fully penetrating them.
Oversized hex screws are commonly used in construction and engineering applications where a larger screw is necessary to ensure a secure hold. With so many different options to choose from, it’s important to select the right type of hex screw for your specific project or application to ensure optimal results.
Metric Hex Head Screws
Hex screws come in various sizes and types, and one popular type is the metric hex head screw. These screws have a hexagonal head that requires a hex wrench or Allen key for installation. Metric hex head screws are classified based on their thread diameter, length, and thread pitch.
They are commonly used in machine assemblies and automotive applications where precise tightening and secure fastening are crucial. Some popular types of metric hex head screws include hex socket head cap screws, hex flange screws, and hex tap bolts. It’s important to choose the right size and type of hex screw for your application to ensure proper fit and maximum holding power.
Whether you’re repairing a motor, constructing a machine, or assembling furniture, metric hex head screws provide a reliable and sturdy option for your fastening needs.
Standard Hex Head Screws
When it comes to fastening two or more parts together, hex head screws are a popular choice due to their sturdy construction. These screws have six-sided heads that make them easy to drive with a wrench or socket. One of the most common types of hex head screws is the standard hex head screw, which is characterized by having a flat washer face under the head.
This feature helps to distribute the load evenly and protect the material from being damaged. Standard hex head screws are available in various sizes and materials, including stainless steel, brass, and aluminum. They are widely used in applications ranging from automotive to construction, and they are perfect for securing materials that are subjected to heavy loads and vibrations.
Overall, standard hex head screws are a reliable and cost-effective solution for fastening tasks that require a high level of torque and precision.
Screw Sizing 101
When it comes to choosing the right hex head screw size for your project, it can be challenging to know where to start. The good news is that there are many online resources available, including hex head screw size charts, that can help simplify the process. These charts typically provide information on screw diameter, thread pitch, and length, as well as the corresponding wrench size.
However, it’s important to keep in mind that there are many variables to consider when selecting the right screw for your application, including the material you’re working with, the expected load, and the desired level of strength and durability. With this in mind, it’s always a good idea to consult with a professional or do some research to ensure you’re choosing the perfect screw for your needs. So next time you’re tackling a DIY project or home repair, make sure to refer to a hex head screw size chart and take the time to select a screw that will get the job done right!
Thread Pitch
When it comes to screws, size really does matter, and thread pitch is a key factor. Thread pitch refers to the distance between the threads on a screw, and it can affect the screw’s torque, strength, and suitability for certain applications. A screw with a larger thread pitch will tend to be stronger and more resistant to vibration, while a screw with a smaller thread pitch will provide finer control and more precise adjustments.
Choosing the right thread pitch is therefore crucial for ensuring the success and safety of any project that involves screws. Don’t worry, though- screw sizing isn’t rocket science! By understanding the basics of thread pitch and doing a little research on your specific needs, you’ll be a screw-sizing pro in no time.
Length
When it comes to screw sizing, length is a crucial factor to consider. The length of a screw determines how well it will grip a material and how deep it will go. If a screw is too short, it won’t be able to hold the materials together securely.
On the other hand, a screw that is too long can damage the materials being used. The ideal screw length will depend on the thickness of the materials being used and the type of joint being created. For example, if you’re attaching a hinge to a wooden door, you’ll want to use a screw that is long enough to penetrate the door but not too long that it pokes out the other side.
It’s important to measure the thickness of the materials being used and choose a screw that is long enough to penetrate at least two-thirds of the material. By choosing the right length screw, you can ensure a strong and secure joint that will last.
Diameter
Diameter When it comes to screw sizing, understanding the diameter is key. The diameter refers to the width of the screw, measured across the widest point of the threads. The size is typically denoted by a number, such as #6 or #10, which corresponds to a specific diameter measurement in inches.
It’s important to choose the correct diameter for your application, as using a screw that is too small can result in weakened holding power, while using a screw that is too large can strip the material or cause it to split. Think of it like trying to fit a square peg into a round hole – it just won’t work. So take the time to measure and choose the right diameter for your screw, and your project will be off to a great start.
Finding the Right Size
When it comes to choosing the right hex head screw size, it can be a bit overwhelming. With so many sizes and types of screws available, it’s important to have a hex head screw size chart to help you find the perfect fit for your project. One thing to keep in mind is that the size of a hex head screw is determined by the diameter of its shaft, not the size or shape of its head.
The chart will tell you the diameter, thread pitch, and length of the screw you need, making it easy to find the exact match for your needs. Some common hex head screw sizes include 1/4″, 5/16″, and 3/8″, but it’s always best to consult the chart to ensure you have the exact size you need. Remember, choosing the wrong size could lead to a weaker connection or even damage to your project, so take the time to find the right one.
Using a Screw Size Chart
If you are working on a DIY project or repairing something around the house, you may need to use a screw size chart to find the right size screw for the job. It can be confusing to determine the correct size screw, especially if you are not familiar with the various types of screws and their applications. A screw size chart can be a helpful tool in guiding you towards the right size screw for your project.
Additionally, it is essential to consider the material you are working with and the weight it needs to support. This will ensure that you select the appropriate size screw that will properly secure your project. Remember, using the wrong size screw can lead to an unstable or unsafe construction, so take the time to find the right one and make sure everything is secure.
Measuring a Screw
Measuring a screw can be intimidating, especially if you don’t have much experience with hardware. However, it’s essential to find the right size for your project to ensure a secure fit and prevent any mishaps down the line. The first step is to determine the screw’s diameter by measuring the distance across the widest part of the thread.
You can use a ruler or caliper to get an accurate measurement. Afterward, count the threads per inch or TPI to determine the screw’s pitch. The pitch represents the distance between the threads, and it’s essential to match it with the right nut or bolt for a secure fit.
Remember that screws come in various sizes, including standard and metric, so ensure you’re using the right measuring system. Lastly, when choosing the right screw size, consider the material you’re working with and the weight of the object you’re installing. A larger, heavier object requires a more substantial screw, while a smaller, lightweight object can use a smaller screw.
By taking these steps, you’ll be able to find the right screw size and feel confident about your project’s durability and safety.
Consulting with a Professional
When it comes to finding the right size for your clothing, it can be a tricky thing to do. You don’t want to end up with an ill-fitting garment that doesn’t flatter your body, but you also don’t want to buy something that is too small or too big. That’s why it’s important to consult with a professional to help you find the perfect size.
A professional can take into account your body type, measurements, and personal style to guide you in choosing the right size for you. It’s also a good idea to try on different sizes and styles to see what works best for you. Remember, the right size isn’t just about comfort – it’s also about feeling confident and looking your best.
So don’t be afraid to ask for help or try something new. With the right guidance, you can find a size that fits you perfectly and shows off your unique personality and style.
Conclusion
In the world of screws, hex heads are like the cool kids – they stand out and get noticed. And just like picking the perfect outfit, choosing the right hex head screw size takes careful consideration and attention to detail. But fear not, for with the help of this hex head screw size chart, you’ll soon be able to rock the hex head look with confidence and swagger.
So go forth, fellow DIYers and engineers, and hex head screw your way to success!”
FAQs
What is a hex head screw?
A hex head screw is a type of fastener with a six-sided head that requires a wrench or socket to tighten or loosen it.
What are the standard sizes for hex head screws?
The standard sizes for hex head screws range from #0 to 1-1/2 inches, with the most common sizes being between 1/4 inch and 1 inch.
How are hex head screws measured?
Hex head screws are measured from the top of the head to the end of the threads to determine the length, and the distance across the flats of the head to determine the size.
What is the difference between a hex head screw and a bolt?
The main difference between a hex head screw and a bolt is that a screw is fully threaded and is used with a nut, while a bolt has a partially threaded shaft and is used with a mating thread in the material it is fastening to.