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RUBBER & SILICONEStandard parts. Custom solutions.

Rubber stopper

Rubber stopper

One of the best ways to ensure that you have a perfect seal for your holes or joints is the rubber stopper. This product is designed from the ground up to deliver efficiency, high quality and a distinctive value for your money. On top of that, you can also stop any door from closing with help from a rubber stopper. It really helps a lot since you can quickly adapt it in any way that you see fit.
You will notice that most rubber stoppers are used with test tubes, jugs, flasks, and various equipment. The regular rubber stopper has a cylindrical shape. The bottom end is tapered to deliver the ultimate protection and quality. You will find some rubber stoppers with a few holes that will allow you to insert tubing, test equipment, pipettes or anything similar. These are adjusted on a per-user basis, and the return on investment can be awe-inspiring every time.
You want to use a rubber stopper because it helps stick to a circular motion. It has the centripetal force generated by the string tension. That helps maintain the stopper in a particular action, one that will prevent any movement. It helps immensely, and it will provide a perfect set of benefits every time. If the rubber stopper has any pulling weights and those are removed, what happens is that gravity will do its job, and then the stopper will not move at all. That’s what makes a rubber stopper ideal for a variety of scientific purposes, but also for real-life situations as well.

All dimensions are in mm​

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.

Dimension guide
T-shaped stopper — original A, B, C, D and E dimensions
A recessed RST variant is illustrated. The head remains closed. Check E and the approved section for the selected part.
Product appearance
Rubber Silicone Plugs(T-shaped-RST) — product view
Illustrative product rendering. Refer to the selected part drawing and table for dimensions.
PartNo.A(mm)B(mm)C(mm)D(mm)E(mm)
RST2.5-5.5-5.32.55.55.320
RST2.7-5.5-52.75.5520
RST3-4.3-4.534.34.50.80
RST3-7-73772.20
RST3.3-6.5-63.36.561.50
RST3.5-6.5-63.56.5620
RST3.8-7-10.53.8710.51.50
RST3.8-7-73.8771.50
RST3.8-7-63.8761.50
RST4-7.5-647.5620
RST4-9.5-749.572.50
RST4.3-8-64.3861.50
RST4.5-7.5-64.57.5620
RST4.8-6.8-3.64.86.83.60.90
RST4.8-9-74.8971.50

Need a different fit? Share the opening dimensions, mating profile and intended use for a custom size.

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