Rubber plugs for holes
As the name implies, rubber plugs for holes are utilized across various industries – especially manufacturing and assembly plants -for closing openings in different surfaces, including the ones manufactured from wood, plastic, metal, as well as glass. They come in various shapes and size, however, there are five most common sizes include 9mm, 8mm, 7mm, 6mm, and 5mm, but, there are various organizations that offer customization services, which means that customers can order rubber plugs for holes according to their own specifications and needs. They are manufactured from high-quality materials, which implies that they are capable of resisting both external and internal factors, thus, protecting the items placed inside the opening.
Although these rubber plugs for holes are quite flexible, they offer a wide range of benefits. For instance, they are anti-aging, which implies that they can be used for a really long time, thus, companies can save a lot of money and time since they won’t have to replace them often. Additionally, they can resist various substances including oils, fats, liquids, humidity, extremely hot & extremely low temperatures, as well as UV rays and chemicals such as acids – which is exactly why they can be used across various manufacturing and assembly plants such as the automotive and aerospace industries.
Rubber plugs for holes are easy to install and industries won’t require additional tools and equipment for placing them in an opening. However, in order for them to be installed properly, the size of the rubber plug needs to match the opening it needs to be applied for. When the size is appropriate, it only needs to be pressed into the opening and the installation process is complete. Since they can withstand both indoor and environmental factors – such as snow and ice – they can be utilized and installed both indoors and outdoors.
Stopper & Plug Size Catalog
Compare four stopper profiles and check the selected part dimensions against your opening and available depth. Each profile has its own drawing and dimension meanings.
Custom colors are available to your Pantone color code. Include the code in your inquiry.
RST T-Shaped Plugs
Match stem diameter A, flange diameter B, stem length C and flange thickness D. E refers to the underside recess; use the selected row and approved drawing to confirm the actual profile.

RSA Tapered Corks
Compare large-end diameter A, small-end diameter B and Height, in mm. The mating bore and required seating depth determine where the taper contacts the opening.

RSB Undercut Plugs
Compare neck diameter A, flange diameter B, flange-to-lip distance C and flange thickness D. Check panel thickness and rear clearance. E refers to the underside recess.

RSD T-Shaped Stoppers
Compare stem diameter A, flange diameter B, stem length C and head thickness D, in mm. Check the seating surface and available depth as well as the hole diameter.

Need a different fit? Share the opening dimensions, mating profile and intended use for a custom size.
Discuss Your RequirementsProduct specifications
- Product form
- Blanking insert for an unused panel opening
- Application focus
- Vehicle body openings. Size the part against the selected assembly.
- Dimensions to confirm
- Opening profile, panel thickness, retaining groove and head overlap.
- Exposure to evaluate
- Sunlight or UV, outdoor weather, moisture and oil splash. Validate the selected material under the combined conditions.
- Panel engagement
- Seat the head against the panel and check retention at the actual cut edge.
Need a quote or a custom part?
Send your requirements, drawings or samples to discuss standard and custom silicone rubber parts.
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