rubber bung sizes
A significant number of individuals fail to get exactly the piece they need since they forget about the importance of rubber bung sizes. In a nutshell, rubber bung sizes are one of the most important things to take care of, since the rubber bung must fit the container’s opening perfectly in order to deliver the expected results and perform flawlessly. On the other hand, a vast majority of the ones who fail to order the piece they need try to measure the bung, unfortunately, in a wrong way, so the data about a specific piece they consult before ordering leads them astray.
In order to get the piece that you need we will not only provide you with a rubber bung sizes chart but also explain how you should measure the thread before opting for a particular variant. Namely, what you should do first is measure the diameter of the top surface of the rubber bung, and repeat the practice with the bottom. The next thing to measure is the distance between the two, and, voila! If you have gathered the details correctly you should have obtained everything necessary for you to proceed with your order. Naturally, if only you do not have the model to refer to, use the opening of the container and measure it in order to feed our support team with necessary data, and they will provide you the additional instructions if necessary. Either way, they will offer you a piece of hand free of charge since our clients’ experience is more important to us than the profit.
Finally, if you fail to find the rubber bung sizes you need in our chart, do not worry but inform our support team about the details and we will make sure we craft a customized rubber bung according to the pieces of information you provide.
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.
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
- Dimensions to confirm
- Opening diameter, closure profile, insertion depth and exposed grip.
- Size selection
- Choose the drawing or chart row by its functional dimensions and units; verify mating-part tolerances before ordering.
- Seating check
- Check the sealing contact around the opening and the force needed for insertion and removal.
- Measurement method
- Measure both the larger top face and smaller lower face of the bung, then record overall height and the seating depth in the opening.
Need a quote or a custom part?
Send your requirements, drawings or samples to discuss standard and custom silicone rubber parts.
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