Power Drills: What Size Drill Bit Do You Need For a 38 Bolt?

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Written By John Gibbs

 

 

 

» Power Tools » Drill » Drill Bits » Power Drills: What Size Drill Bit Do You Need For a 38 Bolt?

Are you trying to figure out what size drill bit you should use for a 38 bolt? If so, you’ve come to the right place! This article will help guide you through the process of selecting the best drill bit size for a 38 bolt. We will look at the different types of drill bits available, how to measure a bolt, and the proper drill bit size for a 38 bolt. By the end of this article, you will be equipped with the knowledge to confidently select the right drill bit for your application.

What Size Drill Bit for a 38 Bolt?

What Size Drill Bit For A 38 Bolt?

Drill bit size for a 38 bolt is determined by the major diameter of the thread and the pitch, or threads per inch. A 38 bolt is a metric fastener and the size of the drill bit can vary depending on the length and diameter of the bolt.

  • For a 38 bolt with a diameter of 4.8mm, the appropriate drill bit size is 4.3mm.
  • For a 38 bolt with a diameter of 5.8mm, the appropriate drill bit size is 5.3mm.
  • For a 38 bolt with a diameter of 6.8mm, the appropriate drill bit size is 6.3mm.
  • For a 38 bolt with a diameter of 7.8mm, the appropriate drill bit size is 7.3mm.

To ensure a tight fit, it is recommended to use a drill bit size slightly smaller than the major diameter of the thread, as this will create a tighter fit and reduce the chances of a stripped thread.

Drill bit size for a 58 screw is determined by the major diameter of the thread and the pitch, or threads per inch. A 58 screw is a metric fastener and the size of the drill bit can vary depending on the length and diameter of the screw.

  • For a 58 screw with a diameter of 4.8mm, the appropriate drill bit size is 4.3mm.
  • For a 58 screw with a diameter of 5.8mm, the appropriate drill bit size is 5.3mm.
  • For a 58 screw with a diameter of 6.8mm, the appropriate drill bit size is 6.3mm.
  • For a 58 screw with a diameter of 7.8mm, the appropriate drill bit size is 7.3mm.

To ensure a tight fit, it is recommended to use a drill bit size slightly smaller than the major diameter of the thread, as this will create a tighter fit and reduce the chances of a stripped thread.

What Size Drill Bit for a 5/16 Bolt?

What Size Drill Bit For A 5/16 Bolt?

When it comes to drilling a 5/16 bolt, the best drill bit size to use is a 21/64 inch drill bit. This size drill bit will provide the right amount of clearance for the bolt to fit through. It is important to note that the drill bit should be no bigger than 21/64 inch, as a larger bit could damage the threads of the bolt or compromise its strength.

When drilling with a 21/64 inch drill bit, it is important to ensure that the drill bit is sharp and in good condition. A dull drill bit can cause the bolt to become stuck in the hole, making it difficult to remove. It is also important to ensure that the drill bit is set to the correct speed and is not operated at too high of a speed. This will help to ensure that the drill bit does not cause any damage to the bolt or its threads.

When drilling with a 5/16 bolt, it is also important to use a drill bit that is designed for metal. This will prevent the drill bit from becoming dull quickly and will help to ensure that the bolt is not damaged in any way.

Finally, it is important to use a drill bit that is designed for the specific material that the bolt is made from. Different materials will require different drill bit sizes, so it is important to use the right bit for the job. This will help to ensure that the bolt is not damaged in any way.

Overall, the best drill bit size to use for a 5/16 bolt is a 21/64 inch drill bit. It is important to ensure that the drill bit is sharp and in good condition, as well as being designed for the specific material that the bolt is made from. This will help to ensure that the bolt is not damaged in any way.

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What Size Drill Bit to Tap a 12 Bolt?

What Size Drill Bit To Tap A 12 Bolt?

  • Tap Drill Size: 9/16 inch
  • Pilot Drill Size: 12.5 mm
  • Tap Drill Depth: 1.5 x thread depth
  • Thread Pitch: 12 TPI (Threads Per Inch)

When tapping a 12 bolt, the best drill bit size to use is a 9/16 inch tap drill size. This size drill bit is the appropriate size for tapping a 12 bolt. A pilot drill size of 12.5 mm is also recommended, along with a tap drill depth of 1.5 x thread depth. The thread pitch for a 12 bolt is 12 TPI (Threads Per Inch).

What Size Drill Bit for a 1/4 Tap?

What Size Drill Bit For A 1/4 Tap?

When drilling a hole for a 1/4 tap, the ideal drill bit size is 5/16. The drill bit should be slightly larger than the tap itself to ensure the tap goes in properly and does not get stuck in the hole. Here are some interesting facts and guidelines to consider:

  • The drill bit should be slightly larger than the tap – The drill bit should be 5/16, slightly larger than the 1/4 tap, to ensure the tap is able to go in properly without getting stuck.
  • The hole should be as straight as possible – It is important to ensure the hole you are drilling is as straight as possible, as this will make it easier for the tap to go in. If the hole is not straight, the tap may get stuck in the hole.
  • Use a lubricant – Using a lubricant, such as WD-40 or a tapping fluid, will help the tap go in easier and reduce the risk of it getting stuck in the hole.
  • Use a tapping guide – Using a tapping guide will help ensure the hole is drilled straight and that the tap will go in properly.
  • Use the correct drill bit speed – It is important to use the correct speed when drilling a hole for a 1/4 tap. If the speed is too fast, it can cause the tap to get stuck in the hole.

These are some of the important considerations to keep in mind when drilling a hole for a 1/4 tap. By following these guidelines, you can ensure the drill bit size is correct, the hole is straight, and the tap will go in properly.

What Size Drill Bit for a 14-20 Bolt?

What Size Drill Bit For A 14-20 Bolt?

When drilling into a 14-20 bolt, the recommended drill bit size is 3/32 inches. The size of the drill bit is important, as it will determine the size of the hole being drilled and how easily the bolt can be inserted. It is important to ensure that the hole is large enough for the bolt to fit securely.

Using a drill bit that is too small can lead to the bolt not fitting into the hole, while using a drill bit that is too large can weaken the strength of the bolt. Therefore, the correct drill bit size is essential for successful installation of the bolt.

Drill Bit Size Chart for 14-20 Bolts

Bolt Size Drill Bit Size
14-20 3/32 inches

Using the correct drill bit size is important for the successful installation of the bolt. For a 14-20 bolt, the recommended drill bit size is 3/32 inches. This size will ensure that the hole is large enough for the bolt to fit securely, while not weakening the strength of the bolt.

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What Size Hole to Drill for a 38 Bolt?

What Size Hole To Drill For A 38 Bolt?

When drilling holes for a 38 bolt, you should use the following drill bit sizes:

  • For a 38-gauge bolt: 7/32 inch
  • For a 38-gauge bolt: 5/16 inch
  • For a 38-gauge bolt: 3/8 inch
  • For a 38-gauge bolt: 7/16 inch
  • For a 38-gauge bolt: 1/2 inch

It is important to use the proper size drill bit when drilling a hole for a 38 bolt. If a hole is too large, the bolt may not fit and the joint may not be secure. On the other hand, if the hole is too small, the bolt may not fit or seat properly in the hole.

When drilling the hole, use a lubricant such as machine oil or cutting fluid to reduce friction. This will make the drilling process easier and more efficient.

What Size Drill Bit for a 10-24 Screw?

What Size Drill Bit For A 10-24 Screw?

10-24 screws are among the most common type of fastener used in construction, furniture, and mechanical applications. This type of screw requires a specific drill bit size for optimal performance, and here are some interesting facts to consider when selecting the right one:

  • The number 10 refers to the diameter of the shank in 1/16 of an inch increments.
  • The number 24 refers to the number of threads per inch.
  • The drill bit size for a 10-24 screw is 5/32 inch.
  • For optimal performance, you should use a high-speed steel (HSS) drill bit.
  • HSS drill bits are more resistant to heat and will ensure an accurate hole size.
  • For softer materials such as wood and plastic, you can use a cobalt or titanium drill bit.

By using the correct drill bit size for a 10-24 screw, you can ensure a secure fastening and a long-lasting connection. Make sure to always use the correct drill bit size for optimal performance.

Factors to Consider When Choosing the Right Drill Bit

  • Size of the Bolt: Knowing the size of the bolt is the first factor to consider when choosing the right drill bit. For a 38 bolt, the size of the drill bit should be slightly larger than the diameter of the bolt.
  • Material: Different drill bits are needed for different materials. For instance, if the bolt is made of stainless steel, a cobalt drill bit is required, as it is better suited for drilling through harder materials.
  • Type of Drill: The type of drill being used also matters when choosing the right drill bit. A cordless drill is best for simple tasks. However, for harder and more intricate tasks, an industrial drill is needed.
  • Speed: The speed of the drill is also a factor to consider when selecting the right drill bit. Low speeds are best for harder materials, while higher speeds are suitable for softer materials.
  • Other Considerations: There are other factors to consider when choosing the right drill bit, such as the type of thread and the hardness of the material.

By taking into account all of these factors, you can ensure that you choose the right drill bit for your 38 bolt. With the right drill bit, you can achieve a precise and safe result.

Frequently Asked Questions

What is the difference between a drill bit size and a bolt size?

  • Drill bits are tools used to create holes in materials. Drill bit sizes are measured in inches or millimeters and are typically fractional sizes.

  • Bolts are fasteners used to hold two or more items together. Bolt sizes are measured in inches or millimeters and are typically fractional sizes, but may also include metric sizes.

  • The difference between a drill bit size and a bolt size is that the drill bit size is used for creating holes and the bolt size is used for securing items together.

What type of drill bit is best for drilling into a 38 bolt?

Drilling into a 38 bolt requires the right drill bits for the job. The following are some of the best drill bit sizes for a 38 bolt:

  • 9/64 inch – This is the most commonly used drill bit size for a 38 bolt and is suitable for most purposes.
  • 5/32 inch – This is slightly larger than the 9/64 inch bit and is suitable for larger holes in thicker material.
  • 3/16 inch – This is the largest drill bit size for a 38 bolt and is suitable for drilling into thicker material.

It is important to choose the right drill bit size for the task at hand to ensure a successful result. Larger drill bits can cause the bolt to become over-drilled, resulting in an improper fit. Smaller drill bits may not be able to penetrate the material, or may cause the hole to be too small.

It is also important to use a drill bit that is designed specifically for drilling into metal. Using a drill bit designed for wood or plastic may cause the hole to be too large or the drill bit to become stuck.

How do I know what size drill bit to use for a 38 bolt?

  • First, measure the diameter of the bolt. The diameter of a 38 bolt is .375 inches.
  • Next, choose the bit size that is the closest to the measurement of the bolt. The closest drill bit size for a .375 inch bolt is 3/8 inch.
  • Finally, use the 3/8 inch drill bit for the 38 bolt.

What other factors should I consider when selecting a drill bit size for a 38 bolt?

Material of the Bolt: The material of the bolt is an important factor to consider when selecting a drill bit size. If the bolt is made of a softer material like aluminum or brass, a smaller drill bit size may be needed. For a harder material like steel, a larger drill bit size may be more appropriate.

Thread Pitch: The thread pitch of the bolt is also an important factor to consider. If the thread pitch is finer, a smaller drill bit size may be required. For a coarse thread pitch, a larger drill bit size may be needed.

Surrounding Materials: It is also important to consider the materials surrounding the bolt. If there are any hard materials like metal or concrete near the bolt, a larger drill bit size may be required to ensure that the bit does not get stuck or damaged.

Drill Speed: The speed at which the drill is running is also important. If the drill is running at a higher speed, a larger drill bit size may be needed to ensure that the bit does not overheat.

Drill Type: Lastly, the type of drill being used is important to consider. If a standard drill is being used, it may require a larger drill bit size. For more specialized drills like an impact driver, a smaller drill bit size may be necessary.

What is the Best Way to Ensure Accuracy When Drilling into a 38 Bolt?

It is important to use the correct drill bit size when drilling into a 38 bolt. To ensure accuracy and prevent damage, the drill bit should be slightly smaller than the diameter of the bolt. It is also important to use a drill bit with a sharp cutting edge for best results. Additionally, it is important to use a drill press or drill stand to help keep the drill bit from slipping and ensure a straight, accurate hole.

Conclusion

For the best fit when drilling a hole for a 38 bolt, it is recommended to use a 17/64-inch drill bit. This size bit provides a snug fit with minimal clearance, ensuring the bolt will be held firmly in place.

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About John Gibbs

Hello everyone! My name is John Gibbs. I am 60 years old and have been in the family construction business all my adult life. Construction is not only my profession but also my passion. I know everything about building and repair materials, tools, advanced methods, techniques, and approaches. I will share the same knowledge with you in my articles.

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