What Size Drill Bit for 1/8 Rivet?

This guide will explain the correct drill bit size to use with a 1/8″ rivet.

As a veteran handyman, I know the importance of picking the ideal drill bit size for any rivet. Rivets are used in various fastening applications because of their low cost, simple installation, durability, and dependability. Preparing the holes is essential for proper assembly.

Quick Summary: The recommended drill bit size for a 1/8” rivet size is 0.128 inches. The drill size needed to create the hole for the rivet to pass through is related to the rivet diameter. After the sheets are positioned, the hole size needs to be designated for drilling, and the rivet size is decided.

Check the detailed explanation and charts below.

What Size Drill Bit for 1/8 Rivet?

Rivet Sizes

The widely used rivet sizes or dimensions include the rivet diameters and lengths — in metrics (mm) and imperial (inch) categories.

Imperial

Rivet lengths are often measured in 1/16″ increments, while the diameters are typically measured in 1/32″ intervals, and both are expressed as “dash numbers.” For instance, “-3, -4″ denotes a 3/32″ diameter and 4/16” length.

Rivet lengths are usually expressed in half sizes as well. And they are denoted by a dash number, for example, -3.5 (732″).

Metric

A millimeter defines rivet lengths and diameters in the metric system. Typically (for a normal application), rivets have 2 to 20 mm in diameter and 5 to 50 mm in length.


How to Calculate Diameter and Length — To Determine Rivet Size

You can use these guidelines (below) to establish the rivet size if the design drawing does not include the dimensions of the rivets:

The minimum rivet shank diameter (D) is equal to three times the thickest sheet being joined.

A = 1.5 *D (For rivets with diameters of the rivet shank up to 20 millimeters):

Rivet Shank Length (L), L = S + Allowance (A).


Converting Rivet Sizes – Rivet Diameter Chart

rivet size x diameter table guide

Based on the below chart, you might select a standard rivet size that is a little larger than the rivet diameter you estimated.


Rivet Hole Chart

The drill size needed to create the hole for the rivet to pass through is related to the rivet diameter. After the sheets are positioned, the hole size needs to be designated for drilling, and the rivet size is decided.

rivet diameter x drill size table guide

Therefore, it’s crucial to determine the size of the rivet holes before installation. In most cases, the rivet’s diameter is slightly lower than the required hole diameter. A hole 4-6 thousandths of an inch bigger in diameter should be used to insert a rivet. This makes it possible for the rivet to be fully and readily placed before expanding to cover the gap and increase strength.

Take a look at some of our related articles below.

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About Sam Orlovsky

b1d87d2ee85af3e51479df87928bdc88?s=90&d=mm&r=gCertifications: B.E.E.
Education: University Of Denver - Electric Engineering
Lives In: Denver Colorado

Electrical engineering is my passion, and I’ve been in the industry for over 20 years. This gives me a unique ability to give you expert home improvement and DIY recommendations. I’m not only an electrician, but I also like machinery and anything to do with carpentry. One of my career paths started as a general handyman, so I also have a lot of experience with home improvement I love to share.

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