Black Rubber Stopper

Black Rubber Stopper

Black rubber stoppers have so many uses and applications that we cannot write all in one place. From medical industries to labs and from commercial use to beverages and food, black rubber stoppers are being produced for all sectors. Black rubber stoppers are heavily made for lab works and used with various lab materials and work as stoppers. They help preserve dangerous chemicals and assist in maintaining the quality of experiments being done. The most important feature of these black rubber stoppers is that they are highly heat resistant. That is why no matter how much temperature you use it in, they stay in their place. 
Black rubber stoppers are available in sizes and varieties like with one of two hole functionalities. In laboratory glassware, they can easily cover all kinds of holes and joints. Black rubber stoppers create a liquid-tight seal of glass tubes, test tubes, flasks, funnels, and jugs. Because of the availability of a wide range of sizes, some people struggle to find the exact size they need. We also have a Black rubber stopper size chart especially designed for your ease. These rubber stoppers are made with high-grade rubber for use on commercial and industrial levels. The qualities of black rubber stoppers continually withstand long, complex testing. Then they are finally released for use in the market.
Water leaks and sinkholes sometimes cause headaches, and black rubber stoppers are the only solution to fill those holes. No matter what hole size you are trying to fill, a black rubber stopper will fit in perfectly and stop any water leakage. The right way to order the black rubber stopper is to know precisely the size you need. Buy a rubber stopper of a large size diameter that is smaller than your hole you need it for. Check out our Black rubber stoppers and find the size that fits your use.

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.

Blind-Hole · RSTTapered · RSAUndercut · RSBT-Shaped · RSD

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

Product appearance

PartNo.	A（mm）	B（mm）	C（mm）	D（mm）	E（mm）
RST2.5-5.5-5.3	2.5	5.5	5.3	2	0
RST2.7-5.5-5	2.7	5.5	5	2	0
RST3-4.3-4.5	3	4.3	4.5	0.8	0
RST3-7-7	3	7	7	2.2	0
RST3.3-6.5-6	3.3	6.5	6	1.5	0
RST3.5-6.5-6	3.5	6.5	6	2	0
RST3.8-7-10.5	3.8	7	10.5	1.5	0
RST3.8-7-7	3.8	7	7	1.5	0
RST3.8-7-6	3.8	7	6	1.5	0
RST4-7.5-6	4	7.5	6	2	0
RST4-9.5-7	4	9.5	7	2.5	0
RST4.3-8-6	4.3	8	6	1.5	0
RST4.5-7.5-6	4.5	7.5	6	2	0
RST4.8-6.8-3.6	4.8	6.8	3.6	0.9	0
RST4.8-9-7	4.8	9	7	1.5	0

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

Discuss Your Requirements