3 Inch Rubber Stopper

3 Inch Rubber Stopper

A rubber stopper is a small and tapered plug used to close the openings of glassware, laboratory flasks, and test tubes. This product is made up of cork. A 3 inch rubber stopper is a convenient thing in creating chemical resistance and developing a high degree of seal in an opening.
The 3 inch rubber stopper?is cylindrical with a diameter of 0.5 inches to 5 inches at the top side. Smaller stoppers help glassware, and test tubes and larger stoppers are the appropriate products for laboratory types of equipment like beakers and flasks.
During a laboratory experiment, the rubber stopper’s primary use is to prevent liquid or gas from escaping from the container. It is also used to avoid the samples from contamination and laboratory glassware’s contents from the surrounding. By using this product, experimenters can easily mix or shake solutions without upsetting them.
Rubber stopper is very important for lab applications and they are highly recommended for every work of the laboratory. 3 inch rubber stopper has excellent importance in rocket science and military applications. It has high strength of elasticity and durability and its different varieties can be stretched and reshaped easily without breaking.
3 inch rubber stopper forms gaskets and also seals valuable items for household purposes. For creating efficient production, pick stoppers of different sizes and shapes.
The 3 inch rubber stopper’s principal properties are elasticity, impermeability, and a high degree of chemical resistance. All these properties make it essential as a laboratory stopper. Its elasticity plays a vital role in sealing the glassware.
Its chemical resistance prevents the experimenters from corrosive and many other reactive molecules. Its impermeability does not allow gases or liquids to escape from the container. The Rubber stopper with the 3 inch size is the right choice for your application.

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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