Custom manufacturing example · Food grade waterproof any size closed silicone rubber grommets

CUSTOM RUBBER & SILICONE MANUFACTURING

Food grade waterproof any size closed silicone rubber grommets

A custom component for your assembly.

Define the mating surfaces, dimensions and working conditions. ETOL manufactures the part to the agreed design and material.

Factory direct
Made to order
Drawing & sample support

Share the part, its application and your estimated quantity.

Customize the fit, material and finish

Vulcanization workshop illustration with green molding presses and blue collection bins

Material & hardness

Selected for the contact, temperature and movement

Color & finish

Define the visible surfaces and intended color

Shape & dimensions

Develop holes, lips and walls around the mating parts

Mounting & fit

Match the attachment and installation method

Product Overview

Closed silicone rubber grommets can blank openings in equipment with a solid center and a retaining edge around the panel. The installed profile should allow the perimeter to be inspected and cleaned where residue may collect. Custom sizing needs to follow the actual opening and panel thickness rather than only the visible outside diameter.

For intended food contact use, assess the selected silicone formulation and finished component for the actual contact and cleaning conditions. Any water resistance requirement should likewise be evaluated on the complete installed closure. The rubber material and a closed center alone do not establish those application results.

Seat the grommet on a clean, smooth edge without folding the lip. Keep the center intact during installation and service. After cleaning or removal, inspect for trapped residue and damage around the retaining region before reuse. If the opening later needs to pass wiring or tubing, replace the blank with a suitable designed passage component rather than cutting a hole that leaves an uncontrolled contact edge.

Material options: Custom silicone or rubber formulation, with dimensions and color adapted to the mating component.
Hardness range: Silicone: 20–80 Shore A; rubber: 30–90 Shore A. Balance insertion flexibility with support around the opening. If the opening later needs to pass wiring or tubing, replace the blank with a suitable designed passage component rather than cutting a hole that leaves an uncontrolled contact edge.
Custom profile & fit: Custom sizing needs to follow the actual opening and panel thickness rather than only the visible outside diameter.
Assembly considerations: Seat the grommet on a clean, smooth edge without folding the lip.
Design check: For intended food contact use, assess the selected silicone formulation and finished component for the actual contact and cleaning conditions.

Photos illustrate structure or material only. Custom sizing needs to follow the actual opening and panel thickness rather than only the visible outside diameter. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.

Choosing a material or hardness? Explore the selection guide →

FIND THE RIGHT FIT

Round Grommet Size Catalog

Choose a profile to compare part numbers and dimensions. Inch and metric sizes are listed in separate tables.

Type D Round Grommets in Inches

274 entries for Type D round through-hole grommets. Original fractions are retained, and exactly equivalent standard inch fractions replace decimal values where possible. Other values remain decimal inches.

Generated product visualization of a black rubber Type D grommet with two round flanges, a panel mounting groove and an open central bore. — Illustrative product rendering. Refer to the table for dimensions.

P/N	ID (C)	GD (A)	OD (D)	GW (B)	T (E)	Unit
RG2001	7/64	5/32	1/4	3/32	11/64	inch
RG2002	7/64	5/32	1/4	3/64	11/64	inch
RG2003	5/32	7/32	9/32	3/32	7/32	inch
RG2004	1/8	3/16	5/16	1/16	3/16	inch
RG2005	9/64	1/4	5/16	5/64	1/4	inch
RG2006	5/32	1/4	5/16	7/64	13/64	inch
RG2007	1/8	3/16	11/32	1/16	7/32	inch
RG2008	1/8	1/4	11/32	1/16	7/32	inch
RG2009	1/8	1/4	11/32	3/32	1/4	inch
RG2010	9/64	3/16	11/32	1/16	3/16	inch
RG2011	3/16	9/32	13/32	3/32	5/16	inch
RG2012	3/16	5/16	13/32	1/16	7/32	inch
RG2013	3/16	9/32	7/16	3/32	7/32	inch
RG2014	3/16	5/16	7/16	1/16	3/16	inch
RG2015	3/16	5/16	7/16	1/4	3/8	inch

Type D Round Through-Hole Grommets

866 entries for round panel openings. Compare the outside diameter, inside diameter, panel hole, panel thickness and overall thickness for the required fit.

P/N	OD	ID	GD	GW	T	Unit
RG6-2-4-1	6	2	4	1	3	mm
RG6-2-4-1.5	6	2	4	1.5	3.5	mm
RG6-2-4-2	6	2	4	2	4	mm
RG8-2-6-1	8	2	6	1	3.4	mm
RG8-2-6-1.5	8	2	6	1.5	3.9	mm
RG8-2-6-2	8	2	6	2	4.4	mm
RG8-3-6-1	8	3	6	1	3.4	mm
RG8-3-6-1.5	8	3	6	1.5	3.9	mm
RG8-3-6-2	8	3	6	2	4.4	mm
RG8-4-6-1	8	4	6	1	3.4	mm
RG8-4-6-1.5	8	4	6	1.5	3.9	mm
RG8-4-6-2	8	4	6	2	4.4	mm
RG10-3-7-1	10	3	7	1	4	mm
RG10-3-7-1.5	10	3	7	1.5	4.5	mm
RG10-3-7-2	10	3	7	2	5	mm

Type A Round Grommets

98 GRA sizes with a flanged sleeve profile. Compare the inside diameter, groove diameter and sleeve dimensions.

Generated product visualization of a black rubber Type A grommet with a flat upper flange, long sleeve and chamfered lower edge. — Illustrative product rendering. Refer to the table for dimensions.

P/N	ID	OD	GD	GW	T	Unit
GRA5000	2	8	5	7	8.5	mm
GRA5001	3	8	5	7	8.5	mm
GRA5002	3.5	9	6	8	9.5	mm
GRA5003	3.2	8.2	6	8	9	mm
GRA5004	3.5	11	6.8	8	10	mm
GRA5005	4	10	7	8	9.5	mm
GRA5006	4	11.5	7.3	8	10	mm
GRA5007	4.5	12	7.8	8	10	mm
GRA5008	4.5	11	8	8	9.5	mm
GRA5009	5.5	13	9	8	10	mm
GRA5010	5	12.5	8.3	8	10	mm
GRA5011	5	13	9	9	11	mm
GRA5012	6	14	10	9	11	mm
GRA5013	7	15	11	10	12	mm
GRA5014	7.5	16	12	10	12	mm

Type B Round Grommets

47 RGB sizes with a retaining lip below the mounting groove. Check the groove width and overall thickness for the panel assembly.

Generated product visualization of a black rubber Type B grommet with a flat upper flange, lower retaining lip and central bore. — Illustrative product rendering. Refer to the table for dimensions.

P/N	ID	OD	GD	GW	T	Unit
RGB6001	2	8.5	4.6	3	8	mm
RGB6002	2.5	9	5	3	7	mm
RGB6003	3	9.5	5.5	3	7	mm
RGB6004	3.5	10	6	4	8	mm
RGB6005	4	10.5	6.5	4	8	mm
RGB6006	4.5	11	7	4	8	mm
RGB6007	5	11.5	7.5	4	8	mm
RGB6008	5.5	12	8	4	8	mm
RGB6009	6	12.5	8.5	4	8	mm
RGB6010	6.2	13	9	5	9	mm
RGB6011	6.5	13.5	9.5	5	9	mm
RGB6012	7	14	10	5	9	mm
RGB6013	7.5	14.5	10.5	5	9	mm
RGB6014	8	15	11	5	9	mm
RGB6015	8.5	15.5	11.5	5	9	mm

Blind-Hole Round Grommets

39 BGA sizes with a closed central membrane. Match dimensions A through E to the section drawing and the panel opening.

Generated product visualization of a black rubber BGA blind-hole grommet with a recessed closed membrane and an outer panel groove. — Illustrative product rendering. Refer to the table for dimensions.

P/N	A	B	C	D	E	Unit
BGA1001	10	12	17	2.5	7.5	mm
BGA1002	14	16	21	2.5	9.5	mm
BGA1003	15	20	26	2	9	mm
BGA1004	18	22	28	2.5	9.5	mm
BGA1005	20	25	33	2.5	11	mm
BGA1006	22	27	34	1.6	9	mm
BGA1007	22	28	34	2.5	10	mm
BGA1008	25	30	40	3	10	mm
BGA1009	24	32	40	2.5	11	mm
BGA1010	30	35	45	2.5	10	mm
BGA1011	30	38	45	3	12	mm
BGA1012	32	40	47	3	10.5	mm
BGA1013	35	42	50	2.5	10.5	mm
BGA1014	36	47	53	3	10	mm
BGA1015	42	48	58	6	16	mm

Can't find the right size? Contact us for custom dimensions tailored to your requirements.

From part requirements to production

Define the part

Identify key dimensions, mating surfaces and quantity

Review material & tooling

Agree the compound and manufacturing approach

Evaluate the sample

Review the fit and agreed requirements in the assembly

Produce & inspect

Manufacture and check against the approved requirements

Review the intended assembly

Working conditions

Identify temperature, contact fluids and repeated movement.

Material and structure

Consider hardness together with wall thickness and support.

Installation

Check access, mating dimensions and the fitting sequence.

Ordering this custom component

Can the shape be adjusted to my mating parts?

Yes. Show the receiving opening, contact surfaces and clearance limits. We can review the dimensions and retaining features around the intended fit.

Which details should be agreed before tooling?

Agree the critical dimensions, material, hardness, visible surfaces and sample requirements. Explain how the part is installed and which interfaces control its function.

Can a sample help define the replacement?

A sample can help explain the structure. Compare it with the assembly because wear, swelling or compression may have changed its original dimensions.

How is the quotation for this part determined?

The material, part geometry, tooling, quantity and finishing affect the quotation. Include the intended batch size and delivery destination when describing your requirements.

DISCUSS THIS COMPONENT

Describe the part you need.

Share the fit, operating conditions and quantity with our manufacturing team.