What Size Rubber Grommet Should You Get? Coating Systems (2025)

Rubber grommets are a fantastic way to seal and insulate your industrial machinery. They serve a vital purpose for your machinery, working to keep debris and fluid out of parts where they shouldn’t be. They can also help dampen vibration in many applications for your machinery. However, for these grommets to work well, they must be sized and distributed properly. In today’s blog post, Coating Systems will take a look at what size rubber grommet you need for your specific machine or application.

Related Post: Here Is Why Rubber Grommets Are Better Than Other Grommets

Panel Measurements

One way that you can determine what size rubber grommet you need is to measure the panel. Specifically, you will need to determine the thickness of the panel, the hole size where the grommet will be applied, and the size of the object that will be going through that hole. This information will determine both how thick your grommet needs to be and what the diameter your grommet needs to be.
This is often seen as the most convenient way to measure for grommets because you can figure out what size grommet you need before going to make the purchase.

Related Post: What Are the Advantages of Rubber Grommets?

Rubber Grommet Measurements

Another way to determine what size grommet you need is by measuring for the grommet itself. However, this is often predicated by having the right panel measurements. In other words, if you don’t have the measurements for your panel, you might have to make several trips or orders because you don’t have the exact measurements. However, if you do have enough measurements to know what size grommet you need, you can simply determine what grommets to buy with the right grommet measurements.

What are Your Options?

Rubber grommets come in all sorts of diameters and thicknesses. These can range anywhere from ¾” to 12”. These grommets are tear resistant and highly resistant to heat, making them a great option for your industrial machinery. Determining what size you need will ultimately come down to your individual application or machine. There is no shortage of size options, so you should have a lot of variety to choose from, giving you the ability to find a solution that is perfect for your machine.

Related Post: How Rubber Grommets Can Be Used for Wire Protection

Contact Coating Systems for More Information

Finding the right size rubber grommet can be difficult. In fact, finding the right industrial solutions can be difficult across the board, from coating solutions to lubrication options. For more information and assistance, give Coating Systems a toll-free call at (800) 593-7754 or contact us online today.

What Size Rubber Grommet Should You Get? Coating Systems (2025)

FAQs

How do I know what size rubber grommets to buy? ›

The most straightforward method to determine size is of course involves measuring the width and other dimensional aspects of the panel. This means inculcating the size of the hole in which the grommet will be stashed and the characteristic of the object that will be put through it.

How big should a grommet be? ›

What Size Grommet do you need?
Grommet SizeHole SizeOverall Length
#X0011/640.20
#003/160.20
#01/40.22
#15/160.24
9 more rows

How do you fit rubber grommets? ›

Rubber grommets are a flexible option, so they are fairly easy to install. It's possible to manipulate the edges of the hole to insert a grommet. You can also bend the grommet if necessary to fit precisely into the opening. Using a plastic putty knife, push the grommet fully into the hole.

What size are drill grommets? ›

Each size is available in a variety of hole diameters from 3 / 16 '' to 5 / 8 '' '(black), grommet diameters from 3 / 16' 'to 1' 'and hole thicknesses from 0.5' '' to 1 '' '- all from rubber in retail packaging. Choose from a wide range of sizes, from 1 / 4 "'to 4"' in diameter and 2 "" in diameter.

How do I know what size rubber band I need? ›

Rubber Band Size Numbers

Generally, rubber bands are numbered from smallest to largest, with width first. Thus, rubber bands numbered 8–19 are all 1⁄16 inch wide, with lengths going from 7⁄8 inch to 3-1⁄2 inches. Rubber band numbers 30–35 are for widths of 1⁄8 inch, going again from shorter to longer.

What are the three different types of grommets? ›

Different Types of Grommets

There are three primary types of grommets: plain, rubber, and plastic.

Are all grommets the same size? ›

Grommets and washers are assigned a standard sizing number from #00 to #4. Keep in mind, though, sizing is slightly different between plain/tooth and spur grommets/washers.

How do you calculate grommets spacing? ›

((Curtain Width in Inches) – 5) / 7 = The Distance between each of your grommets. Now this works only if you start the center of your first grommet 2.5″ from both sides. Then you space your grommets X inches apart measuring from the center of one, to the center of the next.

Do you need a special tool for grommets? ›

You could probably install grommets without specific grommet tools if you have enough experience using them, but grommet tools are highly recommended if you're just starting out.

What size is a number 2 grommet? ›

Grommet Size Chart
SizeHole Diameter When Set(in.)
#19/32"
#23/8"
#37/16"
#41/2"
6 more rows

What are the strongest grommets? ›

In general the holding strength and impact resistance of Brass & SS grommets is better than Plastic options.

How do you measure rubber tube size? ›

Tubing is generally measured by the OD Outside Diameter because it is used with push-to-connect fittings. Polyurethane (in general), nylon, and polyethylene tubing all commonly use a push to connect fitting. Softer tubes that use barbed fittings or compression fittings are measured by ID Inside Diameter.

What size grommet curtain do I need? ›

Width: While the width is a personal preference to some extent, our general guideline for grommet curtains is to order panels that are double the width of your curtain pole/track. For example, if your curtain pole is 36 inches wide, we suggest two panels of 36 inches *each*, and not two panels of 18 inches each.

How do you fit ear grommets? ›

Grommets are tiny tubes inserted into the eardrum. They allow air to pass through the eardrum, keeping the air pressure on either side equal. The surgeon makes a tiny hole in the eardrum and inserts the grommet into the hole. It usually stays in place for six to 12 months and then falls out.

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