Things to Consider When Choosing Rubber Grommets

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Grommets, also known as eyelets, serve a variety of purposes and they have many different, important uses. They prevent the damage of various materials, differ in uses and advantages, and are used in numerous industries such as construction, manufacturing, production, and more. For wiring, piping, ropes, and other components that need to be threaded through a hole, rubber grommets are necessary for their protection.

These rubber eyelets keep these integral elements safe from damage and serve as a mechanical buffer between the metal and the component. They prevent the grazing or chafing of cables, lines, and wires on a rough surface and also help avoid leaks, short circuits, malfunctions, and grounding of electrical wires when they are passed through metal. They effectively reduce damaging vibrations, are waterproof, dustproof, and resistant to tearing, abrasions, corrosion, and rust. There are several different types of rubber grommets, so here are some things to consider when choosing the ones that will suit your specific needs.

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1. Material Type

They can be made of different rubber compounds that allow different levels of hardness. Depending on the expected stress level, they can be made from Natural rubber, Nitrile rubber (Buna-N), Silicone, Neoprene, or fluoro rubber (FKM). Certain compounds that are specially formulated are resistant to excessive heat, fungus, oil, and UV rays.

2. Size


Rubber eyelets can be sized to fit all types of holes and components and they vary in groove widths and inner and outer diameters. A properly sized one should snap firmly into the panel hole and will be easy to position. Choosing the proper size will also offer other benefits like sealing gaps and preventing air, dirt, and water from entering the opening and affecting the wiring. If you are unsure of what size will fit your needs, you can check this size chart for more information.

3. Shape


Due to the production method, the grommets are not exclusively circular but can be molded to fit a variety of shapes. The most common shapes include round, oval, square, blind hole, and special shape eyelets. Certain manufacturers also offer customized ones to suit the customer‘s requirements.

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4. Purpose

Different rubber grommets

Different rubber grommets are suitable for different purposes and environments. Natural rubber ones are highly-resistant and have good insulation properties. Neoprene ones are suitable for outdoor products since they are weather and heat resistant. The ones that come in contact with oil should be composed of Buna-N which is also a semiconductor material that has anti-static properties. Fluoro rubber is chemically extremely stable so it is great for strong acid and alkali environments. Silicone grommets are environmentally friendly and are especially suitable for medical equipment and products.


These accessories protect cables and wires from sharp corners or edges and can also be used to cover holes. Not only that, they can protect from compression forces, reduce noise levels, act as vibration dampeners, and provide some extra stability for wiring. They are quality long-term solutions that offer numerous benefits to meet any requirement and suit all needs.

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