What Size Drill Bit for a 1-64 Tap?

As an Amazon Associate we earn from qualifying purchases.

Regarding maintenance, 1-64 taps are usually present and commonly used. If you don’t know what size drill bit for a 1-64 tap is, continue reading. Although it’s usually shown in the packaging, it comes with. If you want to make sure about the sizing, continue reading.

What Size Drill Bit for a 1-64 Tap?

The size drill bit for a 1-64 tap is drill bit size #53, which equates to .0595 inch in diameter or 1.5113 mm. 1-64 is part of the national coarse thread. NC refers to the standard sizing that the United States and Canada follow.

Drill bits of various sizes placed on a white background

The length is usually ½ inch longer than the tap. Unlike the ⅜” tap, the 1-64 doesn’t have different thread pitches, so it sticks to 1 sizing. 1-64 is also not part of the NPT or the National Pipe Thread, which is the standard for tapered threads like the 1-2 NPT tap.

1-64 is commonly used for maintenance and portable drilling jobs. So if you’re using one, it’s highly likely you’re doing some maintenance. 

Tips for Using Medium Drill Bits

Maintain Your Drill Bits and Drill Tools

Your drill bits have a lifespan, and the less you take care of them, the less you will be able to use them. That’s why it’s important to do regular maintenance to check on their condition.

The quality of your work usually determines your tool’s quality. Quality workpieces can only be produced when your tools are in good condition. It’s also essential to do regular maintenance if you want to avoid mistakes and accidents when drilling.

Maintaining your drill bits extend their lifespan so you can use them longer, saving you from unwarranted replacements. You can do maintenance before and after use if you want to be meticulous.

Consider Using Stud Finder

A stud finder ensures you are not drilling into a water pipe or electric cables. Drilling through electric cables can create a huge accident, like electrocuting yourself. So, it’s best to use a stud finder as a safety precaution.

Complete drill bit set with various sizes and kinds stored in a red and white case

It’s also useful to avoid hitting water pipes which can cause leakage and flooding in your home. You should use a stud finder when drilling with hazardous materials near the drilling spot.

If you’re drilling into an unfamiliar surface, it’s best to use a stud finder to ensure you are drilling precisely and accurately. It’s better to be safe than sorry.

Wear Protective Eyewear

Since I’m dealing with medium drill bits, debris could fly away and land into your eyes. Accidents related to eyes are one of the most common mistakes people do when handling drills. It’s important to protect your eyes from flying debris, which might lead to serious injuries.

Wear safety glasses as a precaution. There is a lot of protective eyewear you can choose from that has different designs. Choose one that fits snugly in your head so it doesn’t slip off as you are drilling.

You can put it in a checklist before drilling so you won’t forget to wear them. 


1-64 taps are part of the NC thread, and its drill bit size can usually be found in most drill bit size charts. It’s part of the small drill bit size, so it’s better to use a drill press for better accuracy.