Solid rubber stoppers
Solid rubber stoppers are tiny, narrowing stoppers commonly utilized to plug holes in test tubes, flasks, and other laboratory glassware. There are also stoppers that are manufactured from cork that can be used for such applications. Nevertheless, solid rubber stoppers are recommended for applications where a tighter seal or a higher degree of chemical resistance is required. The main role of a solid rubber stopper would be to stop gas or liquid from leaking out of its vessel while performing a scientific experiment. Solid rubber stoppers are also capable to stop contamination of samples by protecting the inside of laboratory glassware from the air. Moreover, by using solid rubber stoppers, experimenters will be able to stir or blend solutions safely while not spilling them. The common stopper has a cylindrical shape with a narrowing bottom end. As opposed to solid rubber stoppers, which are without holes, there are some rubber stoppers that have one or two holes drilled in them to facilitate the passage of pipettes, tubing, or test equipment. However, when it comes to the use of rubber as a laboratory stopper, its primary benefits would be flexibility, resistance to chemicals, as well as a high degree of leak resistance. Their elasticity provides a tight seal to the internal contents of the glassware. In addition, an excellent chemical resistance provides reliable and secure sealing against many corrosive and highly aggressive substances. Their leak resistance ensures that liquids and gases cannot leak out of the container. Solid rubber stoppers have diameters varying typically from size 000 (0.5 in.) to size 16 (5 in.) in the upper part. Their narrowing bottom end varies from five-sixteenths to 3.5 inches. Smaller solid rubber stoppers are suitable for test tubes or other related glassware; in contrast, larger stoppers are suitable for flasks and beakers.
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
- Solid, unbored container stopper
- Application focus
- Test tubes, laboratory flasks and laboratory vessels. Size the part against the selected assembly.
- Dimensions to confirm
- Opening diameter, closure profile, insertion depth and exposed grip. Match these to test tubes and laboratory flasks.
- Closure section
- Closed, unbored section; define the sealing profile and the insertion stop.
- Profiles discussed
- Cylindrical sections. Select the profile that matches the mating part and dimension that section explicitly.
- Contact conditions
- Other gases and air: define concentration, temperature and contact time, then check compatibility with the chosen compound.
- Seating check
- Check the sealing contact around the opening and the force needed for insertion and removal.
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