Stopper sizes
Stoppers or also known as bung plugs are an essential equipment that you often forget when we talk about laboratory equipment. When we say laboratory, you always think of eprouvettes, Erlenmeyer, metallic stands, torches, scales, and thermometers. But these stoppers or bungs are as important as the previously mentioned objects. Just make sure you choose the right stopper sizes if you want the best outcome.
They are made to tight seal the glass made equipment and not to let the chemical escape from the glassware whether that is a liquid or a gas. Also, they are used to help the brewing process of the alcohol because when it ferments it releases gas and if you let that gas collect you might have an explosion in your brewery.
There are a variety of stopper sizes available on the market. Also, there are different types such as: without holes when you need them just like a cap, with one hole if you need to put something in the container like an indicator, or with two holes to help the process of distillation and extraction of gasses. You should use the two-holed stoppers to make a whole circulation for your experiment. The material that these stoppers are made from is usually rubber since it is elastic and can fit tightly on the opening of the glassware.
When it comes to stopper sizes, there are many that you can choose from but before that, you will need to measure the hole that you will try to put the stopper in. The diameter of the hole is the first thing you need to measure, then you will need to measure the height of the neck on the eprouvette or other glass-made container. The diameter of the hole inside the stopper is your third dimension and that is the thickness of the pipe that you will try to connect the glass with.
When you have collected all these measurements you will open the site of the manufacturer and you will find sizes starting from 1 and scaling further. If you do not find the right dimensions, they can be custom-made for you in order to make your laboratory or alcohol brewing process perfect.
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
- Removable closure fitted inside an opening
- Application focus
- Laboratory vessels, Erlenmeyer flasks and brewing equipment. Size the part against the selected assembly.
- Dimensions to confirm
- Opening diameter, closure profile, insertion depth and exposed grip. Match these to laboratory vessels and Erlenmeyer flasks.
- Size selection
- Choose the drawing or chart row by its functional dimensions and units; verify mating-part tolerances before ordering.
- Contact conditions
- Other gases: 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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