Custom manufacturing example · Industrial equipment rubber hole plugs/NBR dust-proof stoppers

CUSTOM RUBBER & SILICONE MANUFACTURING

Industrial equipment rubber hole plugs/NBR dust-proof stoppers

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

Industrial rubber hole plugs close openings in equipment panels or components where a passage is not required during normal use. A custom NBR version can be shaped around the hole and the access available for installation. The visible head, retaining section, and insertion depth should be considered together so that correct seating can be recognized.

A wide head may hide the hole edge, but it should not make a partly inserted plug look complete. Establish a clear final position against the surrounding surface, then inspect the retaining area wherever access permits. On a thin panel, excessive force can bend the panel before the plug reaches its seat. On a deeper opening, check that an internal obstruction is not stopping insertion prematurely.

Keep machining residue and sharp edges away from the rubber during fitting. The selected NBR compound should suit the actual substances and temperature at the hole, including maintenance exposure. When reopening a service hole, use the designed gripping surface and inspect the plug before reuse. Damage beneath the head can be difficult to see after the closure has been pushed back into place.

Material options: NBR compound options, customized alongside the profile and contact conditions.
Hardness selection: Solid rubber options: 30–90 Shore A. On a thin panel, excessive force can bend the panel before the plug reaches its seat.
Custom geometry: On a deeper opening, check that an internal obstruction is not stopping insertion prematurely.
Fit evaluation: The visible head, retaining section, and insertion depth should be considered together so that correct seating can be recognized.
Color & OEM: Custom colors; OEM identification positioned outside closure contact surfaces.

Photos illustrate structure or material appearance only. The visible head, retaining section, and insertion depth should be considered together so that correct seating can be recognized. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.

Choosing a material or hardness? Explore the selection guide →

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.