Solid Rubber Stoppers

2021-04-10 · Stoppers & Plugs

Solid Rubber Stoppers

Solid rubber stoppers have an unbored body for closing a vessel opening. They differ from drilled stoppers, which provide a passage for a tube or probe. The sealing surface must fit the vessel neck with enough engagement to hold the stopper and enough exposed material for removal.

Natural rubber and styrene-butadiene rubber, or SBR, are different materials: SBR is a synthetic rubber. The compound selected for a stopper affects its response to chemicals, heat and repeated compression. A material name by itself does not establish a temperature range or compatibility with every laboratory reagent.

For a flask, test tube or jar, compare the opening with the stopper’s top diameter, bottom diameter and height. Check the intended contents and cleaning conditions before choosing the material. Any pressure or vacuum duty also requires a suitable vessel and closure arrangement; a snug fit alone is not a pressure rating.

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.

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.

T-shaped stopper — original A, B, C, D and E dimensions — A recessed RST variant is illustrated. The head remains closed. Check E and the approved section for the selected part.

Rubber Silicone Plugs(T-shaped-RST) — product view — Illustrative product rendering. Refer to the selected part drawing and table for dimensions.

PartNo.	A（mm）	B（mm）	C（mm）	D（mm）
RST2.5-5.5-5.3	2.5	5.5	5.3	2
RST2.7-5.5-5	2.7	5.5	5	2
RST3-4.3-4.5	3	4.3	4.5	0.8
RST3-7-7	3	7	7	2.2
RST3.3-6.5-6	3.3	6.5	6	1.5
RST3.5-6.5-6	3.5	6.5	6	2
RST3.8-7-10.5	3.8	7	10.5	1.5
RST3.8-7-7	3.8	7	7	1.5
RST3.8-7-6	3.8	7	6	1.5
RST4-7.5-6	4	7.5	6	2
RST4-9.5-7	4	9.5	7	2.5
RST4.3-8-6	4.3	8	6	1.5
RST4.5-7.5-6	4.5	7.5	6	2
RST4.8-6.8-3.6	4.8	6.8	3.6	0.9
RST4.8-9-7	4.8	9	7	1.5

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.

Tapered cork — Diameter A, Diameter B and Height — Tapered profile reference. Use Diameter A, Diameter B and Height from the selected row.

Rubber Corks(Tapered-RSA) — product view — Illustrative product rendering. Refer to the selected part drawing and table for dimensions.

Part No.	Diameter A	Diameter B	Height	Materials
RSA1.6-0.4-15.9	1.6	0.4	15.9	Silicone
RSA2-0.5-19.1	2	0.5	19.1	Silicone
RSA3.2-0.8-15.9	3.2	0.8	15.9	Silicone
RSA3.2-1.6-15.9	3.2	1.6	15.9	Silicone
RSA4.8-1.6-15.9	4.8	1.6	15.9	Silicone
RSA4.8-1.6-19.1	4.8	1.6	19.1	Silicone
RSA5.5-1.2-38.1	5.5	1.2	38.1	Silicone
RSA6.4-3.2-19.1	6.4	3.2	19.1	Silicone
RSA6.4-3.2-25.4	6.4	3.2	25.4	Silicone
RSA8.7-4.8-15.9	8.7	4.8	15.9	Silicone
RSA8.7-4.8-25.4	8.7	4.8	25.4	Silicone
RSA9.2-6.2-12.8	9.2	6.2	12.8	Silicone
RSA9.5-6.5-18.5	9.5	6.5	18.5	Silicone
RSA11-8.5-17.5	11	8.5	17.5	Silicone
RSA11.5-6.5-25	11.5	6.5	25	Silicone

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.

Silicone Plugs(Undercut-RSB) — product view — Illustrative product rendering. Refer to the selected part drawing and table for dimensions.

Part No.	A (mm)	B (mm)	C (mm)	D (mm)	E (mm)
RSB2.5-6-3	2.5	6	3	1.5	0
RSB3-7-3	3	7	3	2	0
RSB3.5-7.5-3	3.5	7.5	3	2	0
RSB3.6-7.5-6	3.6	7.5	6	2	0
RSB4-8-3	4	8	3	2	0
RSB4.5-8.5-3	4.5	8.5	3	2	2
RSB5-9-3	5	9	3	2	2.5
RSB5.5-9.5-3	5.5	9.5	3	2	3
RSB6-10-4	6	10	4	2	3.5
RSB6.5-10.5-4	6.5	10.5	4	2	4
RSB6.5-12-8	6.5	12	8	2	0
RSB6.7-8.7-5.3	6.7	8.7	5.3	1.3	4.1
RSB7-11-4	7	11	4	2	4.5
RSB7.5-11.5-4	7.5	11.5	4	2	5
RSB8-12-4	8	12	4	2	5.5

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.

T-shaped stopper — original A, B, C and D dimensions — Solid T-shaped profile reference. Dimensions A–D follow the selected part drawing.

Silicone Stoppers(T shape) — product view — Illustrative product rendering. Refer to the selected part drawing and table for dimensions.

Part No.	A (mm)	B (mm)	C (mm)	D (mm)	Materials
RSD2.7-5.5-5	2.7	5.5	5	2	Rubber, Silicone
RSD3-7-7	3	7	7	2.2	Rubber, Silicone
RSD3.3-6.5-6	3.3	6.5	6	1.5	Rubber, Silicone
RSD3.5-6.5-6	3.5	6.5	6	2	Rubber, Silicone
RSD3.8-7-6	3.8	7	6	1.5	Rubber, Silicone
RSD4-9.5-7	4	9.5	7	2.5	Rubber, Silicone
RSD4.3-8-6	4.3	8	6	1.5	Rubber, Silicone
RSD4.5-7.5-6	4.5	7.5	6	2	Rubber, Silicone
RSD4.8-9-7	4.8	9	7	1.5	Rubber, Silicone
RSD5-12-8	5	12	8	2.8	Rubber, Silicone
RSD5.3-9.5-7	5.3	9.5	7	1.5	Rubber, Silicone
RSD5.5-8.5-7	5.5	8.5	7	2	Rubber, Silicone
RSD5.8-10-8	5.8	10	8	2	Rubber, Silicone
RSD6-13-8	6	13	8	3.5	Rubber, Silicone
RSD6.3-10.5-8	6.3	10.5	8	2	Rubber, Silicone

Need a different fit? Share the opening dimensions, mating profile and intended use for a custom size.

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Solid Rubber Stoppers

Solid Rubber Stoppers

All dimensions are in mm

Stopper & Plug Size Catalog

RST T-Shaped Plugs

RSA Tapered Corks

RSB Undercut Plugs

RSD T-Shaped Stoppers

Need a quote or a custom part?

Ready to Find Your Rubber Part?

Request a Quote

Solid Rubber Stoppers

All dimensions are in mm​

Stopper & Plug Size Catalog

RST T-Shaped Plugs

RSA Tapered Corks

RSB Undercut Plugs

RSD T-Shaped Stoppers

Need a quote or a custom part?

Ready to Find Your Rubber Part?

All dimensions are in mm