What Size Drill Bit for M6 Rivnut?

What Size Drill Bit for M6 Rivnut?

Are you ready to embark on a drilling adventure? Well, hold on tight because we’re about to take you from zero to one hundred in the fascinating world of M6 Rivnut drill bits! Whether you’re a seasoned pro or just starting out, knowing the right size bit for your M6 Rivnut can make all the difference. In this comprehensive guide, we’ll walk you through everything you need to know about M6 Rivnut drill bits, from the perfect size to avoid drilling the wrong hole to useful tips that will elevate your drilling game. So grab your hard hat and join us as we dive deep into the world of M6 Rivnut drill bits. The only question is, are you ready to drill?

What is a Rivnut/Nutsert?

A Rivnut, also known as a Nutsert, is a fastener that’s used to create threaded holes in thin materials. It’s great for applications where you don’t have enough material thickness to tap a thread into the hole. With an M6 Rivnut, you can easily attach components onto sheet metal or plastic without needing additional tools like a drill and tap.

What is a Rivnut/Nutsert?

What is an M6 Rivnut?

M6 Rivnuts, also known as blind rivet nuts and nut-serts, are a type of fastener that is installed in a hole drilled in sheet metal, wood or other materials. It expands when the mandrel is pulled through the body of the nut to anchor it in place. This creates a strong and reliable hold even when used on relatively thin materials.

What is the Difference between an M6 Rivnut and 14-20 Nutsert?

When it comes to fastening materials together, there are a variety of hardware solutions available. While many opt for traditional nuts and bolts, there is another option – Rivnuts®. Also known as Nutserts© or threaded inserts, these specialized pieces offer an easy and secure way to fix items in place.

Choosing the right size Rivnut is essential; an M6 Rivnut and 14-20 Nutsert are two of the most popular sizes used for many projects. But there are some important differences between them that you should know before making a selection.

An M6 Rivnut features a 6 mm diameter hole with internal threading, while a 14-20 Nutsert has a slightly larger diameter hole of 14 mm with external threading. It is important to consider the size of your project when deciding which option is right for you. Generally, M6 Rivnuts provide a secure fit for fastening lighter material such as metal or plastic while 14-20 Nutserts are best suited for heavier materials like wood or concrete.

When it comes to installation, the M6 Rivnut is typically inserted with a riveting tool, while a 14-20 Nutsert requires a wrench or nut driver for secure fitting. Both options are designed to provide a strong and reliable connection that can stand up to vibration and corrosion.

In addition, an important factor when selecting either option is the size of drill bit needed for installation. For the M6 Rivnut, an 8.5 mm drill bit is recommended. For a 14-20 Nutsert, a 15/64” or 5 mm drill bit should be used to ensure that the hole is large enough for the nut to fit correctly.

What is the Difference between an M6 Rivnut and 14-20 Nutsert?

What Size Drill Bit for an M6 Rivnut?

If you’re looking for the ideal size drill bit to use with an M6 Rivnut, then look no further. This guide explains everything you need to know about what size drill bit is best suited for an M6 Rivnut.

M6 Rivnuts are a type of fastener used in many industries, from aircraft and automotive engineering to the home handyman. They offer a great solution for fastening materials together without having to drill any holes, and they’re easy to use.

The size of the drill bit needed for an M6 Rivnut depends on a few factors, such as what type of material you are attaching the rivnut to and the thickness of the material. The most common drill bit size for an M6 Rivnut is 6.5mm (or 1/4 inch). This is the standard size recommended by most manufacturers, but it’s always best to double-check before purchasing a drill bit and rivnuts.

When using an M6 Rivnut, it’s important to ensure that the drill bit you use is the same size as the Rivnut. If it’s too small, there won’t be enough of a seal to ensure that the fastener stays tightened and secure.

It’s also important to note that most M6 Rivnuts require a special tool to install them correctly. This tool is available online or at most hardware stores, and it’s important to use the correct tool for installation to ensure that your Rivnuts are properly secured in place.

When drilling into any material, it’s also important to wear the proper safety equipment such as goggles and gloves. This will help protect you from any debris or sharp objects that may be created during the drilling process.

What Size Drill Bit for an M6 Rivnut?

What Size Hole to Drill for an M8 Rivnut?

When it comes to securing two pieces of metal together, an M8 Rivnut is a great option. But before you can install one, you need to know what size drill bit to use.

The correct size drill bit for an M8 Rivnut is 9mm (or 3/8″). This will provide the right sized hole to tap in the Rivnut with a wrench or pliers.

It’s important to bear in mind that the hole you drill must be slightly bigger than the M8 Rivnut itself, and if it’s too small it won’t fit properly into the hole. If you’re unsure in size, always err on the side of caution and go for a 9mm (3/8″) bit. [1]

Use a sharp bit and take your time. A slow and steady approach usually delivers the best results!

You can then insert the M8 Rivnut into place and secure it with a wrench or pliers. It’s a great way to join two pieces of metal together and keep them securely fastened.

If you’re looking for a secure and reliable way to join pieces of metal, an M8 Rivnut is a great choice. The best option is 9mm (3/8″). With some patience, you’ll have your pieces of metal securely fastened in no time!

What Size Drill Bit for a 14-20 Nutsert?

Nutserts are an incredibly useful fastening component that is used in many industries and applications.

For a 14-20 nutsert, use a 25/64 bit. A 25/64 bit is the most common size, as it provides the ideal balance between grip and ease of installation. This size will ensure your nutsert is securely fastened without causing any damage to the surrounding material.

What Size Drill Bit for a 14-20 Nutsert?

You should not use a bit larger than 25/64, as this can cause damage to the fastener and create an unreliable connection. In addition, using a smaller bit may lead to your nutsert coming loose over time. [2]

For the best results, use a high-quality bit that is properly sharpened and in good condition. This will ensure that your nutsert connects securely and is held in place for years.

Drill Bit Size Considerations

Drill bit material

High-speed steel (HSS) bits are great for various materials including metal and wood. For plastic or aluminum alloys, cobalt bits can be used. Cobalt bits are sturdier and can be sharpened multiple times, making them a great choice for softer materials. Cobalt bits will cost more, but they are worth the investment for their durability.

Drill bit size

The standard size for an M6 Rivnut is 6mm, so a 6mm bit should be sufficient in most instances. For harder materials use a larger bit. For stainless steel or aluminum, then a 7mm bit may be needed for increased strength and accuracy.

Drill bit type

HSS bits provide good performance and can usually be used in various range of materials. Cobalt bits last longer and can generally be used on harder materials, but they may be more expensive.

Also consider the type of head that your bit has. A countersink is often recommended for softer materials, as it helps keep the M6 Rivnut in place. For harder materials, a standard bit with straight flutes or spiral flutes may be more appropriate.

As a general rule, the deeper the hole, the larger the bit should be. You can usually find this information on the product packaging or in the manufacturer’s instructions.

Drill bit speed

A high-speed setting produces more heat, which can cause damage to the rivet and weaken its hold. Use a moderate speed for metal or plastic. Harder materials require a slower and more precise bit speed.

Drill Bit Size Considerations

Drill bit lubrication

Lubricant reduces friction and heat build-up. A light oil or cutting fluid should be applied to the bit before starting, as this will help extend its lifespan. [3]


What size drill bit for a M6 nut rivet?

In general, a 6mm (0.236 inches) or 7mm (0.276 inches) bit is for an M6 nut rivet.

For softer materials it’s best to use a 6mm bit for an M6 nut rivet. This provides the necessary clearance for the nut to be easily inserted and secured in place.

For steel or aluminum, a 7mm bit is recommended. This will provide the necessary clearance for the nut to be inserted and tightened securely without any problems. [4]

Use a bit that is designed specifically for M6 nuts. Using a standard bit can cause the nut to become stuck in place, making it more difficult to remove.

What drill bit for M6 bolt?

If the hole is too small, the bolt won’t fit and if it’s too large then it may not create a strong enough connection.

The standard bit size for an M6 bolt is 6.0mm, although some situations may call for a bit size of 7.0mm or even 8.0mm. In most cases, the 8.5mm bit should be used to ensure that the hole isn’t too big or too small. [5]

A masonry bit should be used for any drilling into concrete. The best types of drills are those that have high torque and speed settings, as they will work better on harder surfaces like concrete or metal.

What size hole do you drill for a rivet nut?

When it comes to drill bits for rivet nuts, size matters. Rivet nuts are small round inserts that are used to secure fasteners to panels or frames. They require a specific sized hole in order to be inserted properly. Measure the diameter of an M6 rivet nut before drilling the hole.

For aluminum or plastic materials, a 5/16” twist drill is often recommended when using an M6 Rivnut. However, if you’re drilling into steel, then it’s best to use a 6/32″ bit to ensure a snug fit.

When drilling, always remember to use the correct speed for whatever material you’re working with and be sure to apply light pressure on the drill bit as it can easily snap off if too much pressure is applied. Pushing down hard on the drill will also create unnecessary heat which could affect the integrity of your rivet nut. It’s important to take your time when drilling and always double check the size of your hole before inserting the rivet nut. [6]

Using the correct bit will ensure a secure fit and provide a strong grip for whatever fastener you’re using. If you don’t have access to specialized tools or gauges, it’s always best to err on the side of caution and use a slightly larger bit than the size of the rivet nut. This will ensure your fastener has a snug fit and won’t come loose over time. With these tips, you’ll be able to drill the correct hole for an M6 Rivnut in no time!

What is the size of M6 Rivnut?

The M6 Rivnut is one of the most popular sizes in terms of rivnuts. It has an outside diameter of 9mm and a thread size of 6mm. This makes it an ideal choice for many applications, from furniture manufacturing to automotive repair.

Generally, you will need a 7mm bit for soft materials and an 8mm bit for harder materials. Use the correct size bit as drilling with too small of a bit can cause burrs and damage the threads.

Ensure that the material into which you are inserting the Rivnut is thick enough to accept it. If not, then you will need to use an oversized drill bit or even ream the hole out with a step drill.

Once your rivnuts have been securely fitted it is important to ensure that they are properly torqued down using an appropriate torque wrench. Properly torquing your M6 Rivnuts will ensure that they are secure and not prone to vibration.

Finally, it is important to note that the M6 size is only one of many sizes when it comes to rivnuts. There are larger and smaller sizes readily available, from M3 (3mm outside diameter) right up to M12 (12mm outside diameter). Thus, you will need to ensure that you use the correct size for your application.

With the right information and knowledge, you can install M6 Rivnuts safely and securely every time.

Useful Video: Choosing The Right Size Pre Drill Bit | Beginner


In conclusion, the M6 Rivnut is an incredibly popular size and can be used for many projects. However, Ensure that you have the correct size drill bit when fitting your rivnuts. This will help to ensure that they are properly torque-able and secure in place.

Remember, if you are ever unsure about the bit size, it is worth consulting a local hardware store or an online resource to help you make the right choice. With the correct information and knowledge, you can safely install M6 Rivnuts into your project every time.


  1. https://www.garagejournal.com/forum/threads/metric-rivnuts-drill-bit-size.368195/
  2. https://www.andymark.com/products/1-4-20-thread-rivet-nut
  3. https://austms.com/news-updates/a-brief-guide-to-choosing-the-best-drill-bits-for-exploration-drilling
  4. https://www.locostbuilders.co.uk/viewthread.php?tid=44665
  5. https://www.cyberpowersystems.com/faqs/what-is-the-difference-between-10-32-12-24-and-m6-rack-screws/
  6. https://powermentools.com/what-size-drill-bit-for-m6-rivnut/