Sheet metal rubber plugs
When there are openings that have sharp and rigid edges in metal surfaces, most industries – such as the aerospace, military, and automotive industries – choose to use sheet metal rubber hole plugs. They are manufactured in various shapes, sizes, and models, and some of the most used models include button plugs with recessed heads, snap-in plugs, as well as plugs with dome heads, which means that they can be suitable for a wide range of openings. Of course, the initial purpose of these sheet metal rubber hole plugs is to eliminate the sharp edges, however, there are other benefits that these rubber items can provide customers with.
For starters, they are manufactured from high-quality rubber, suggesting that they will be quite flexible, yet incredibly durable and long-lasting, something that can save organizations a lot of money and time since they won’t have to worry about replacing the items as often as they would if they opted for some other options available on the market. Besides this, sheet metal rubber hole plugs can protect the materials – such as wires, cords, cables, and tubing – installed within them from getting damaged, cut, or entirely destroyed by the sharp edges in the openings.
These rubber items can withstand extremely low and high temperatures, hence, they can be used in both outdoor and indoor settings. Sheet metal rubber hole plugs can also resist a wide range of factors and substances, including things such as oils, liquids, acids, UV light, dust, grime, dirt, humidity, as well as ozone. Because of these properties, sheet metal rubber hole plugs can be used across almost every industry out there. They are also quite easy to install and there is no need for additional tools and equipment, however, in order for it to be installed properly, the sheet metal rubber plugs must suit the size of the opening.
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
- Metal-panel openings and vehicle body openings. Size the part against the selected assembly.
- Dimensions to confirm
- Opening profile, panel thickness, retaining groove and head overlap. Match these to metal-panel openings and vehicle body openings.
- Installation discussed
- Snap retention. Identify the chosen retention method and the surface or hardware it engages.
- Exposure to evaluate
- Sunlight or UV, ozone, outdoor weather, moisture and dust or debris. 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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