Stoppers Chemistry

Stoppers Chemistry

Stopper chemistry is a minute, and conical-shaped cork is used majorly in the chemistry lab to close openings on flasks, test tubes, and other laboratory glassware. Cork stoppers are also available for this purpose. However,stopper chemistry is favored for use in areas needing a tighter seal or high resistance to chemical substances.
There are stoppers with pre-drilled holes, and there are those without such holes. They are available in an extensive range for all the different sizes. Practically speaking, there are around 16 different standard chemistry laboratory stopper sizes, with each having its distinct standout feature.
The stopper effectively prevents liquid or gas exposure from a container during a chemistry laboratory experiment or industrial experiment. During chemical procedures,stopperscan be used to cover up samples and avoid any form of contamination. You can safely mix chemical substances during the experiment without spilling them once you have the stopper on.Rubber stoppers are one of the most popular stopper chemistry used in chemist lab applications. Not only are they highly effective, but they are also a must-have for every lab.
The regular stopper is cylindrical and of a tapered lower end. Some stoppers have one or two holes for inserting tubes, pipettes, or test material such as a thermometer. In many scenarios,stoppers with pre-drilled holes are preferable.
There might be the need to firmly hold a piece of lab equipment like a thermometer in the center with the airtight feature still in place. In this case, the pre-drilled hole is perfect because it guarantees a firm and accurate alignment. You can customize these for your regular use.
When using stopper chemistry, always look out for leaks. Leaks appear as a result of improperly done holes resulting in chemical leaks or hazards.

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

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