Product Overview
Reliable custom rubber parts for industrial applications
Quick Answer
Silicone T-shaped rubber grommets are molded components for panel hole sealing, cable routing, tube protection and edge isolation. Flange diameter, stem diameter, inner diameter, panel hole fit, overall height, silicone compound, Shore A hardness, color, tolerance and packaging can be customized according to drawings or samples.
Silicone T-shaped rubber grommets are molded elastomer components used for panel hole sealing, cable protection, edge isolation and dust reduction. The T-shaped profile provides a flange or shoulder structure for positioning against a panel surface. Dimensions, silicone compound, Shore A hardness, color, hole fit, panel thickness range and tolerance can be customized according to drawings or samples.
Silicone T-Shaped Rubber Grommets — Waterproof T-Type Bushings for Wire and Cable Protection
Silicone T-shaped rubber grommets are molded silicone bushings shaped like a “T” in cross-section, used to seal and protect wires, cables, and cords as they pass through a drilled hole or panel opening. The T-profile design gives the grommet a raised sealing edge plus a flat mounting base, offering both a secure fit and effective sealing against dust, moisture, chemicals, and impact.
Key Specifications
| Parameter | Typical Specification |
|---|---|
| Material | Silicone rubber |
| Shape | T-type cross-section |
| Color | Black, transparent, or custom colors |
| Opening Size Range | 3.3 mm to 201.5 mm |
| Inner Diameter Range | 1.5 mm to 184 mm |
| Cap Diameter Range | 4.7 mm to 210 mm |
| Groove Thickness | 2.6 mm to 18 mm depending on size |
| Key Properties | Acid/alkali resistant, corrosion resistant, impact resistant, waterproof, dustproof |
| Measurement Note | Manually measured, slight tolerance; actual product prevails |
What Is a T-Shaped Rubber Grommet?
A T-shaped rubber grommet is a bushing molded with a distinct T cross-section, featuring a wider sealing lip on one side and a narrower mounting stem or flange on the other. This shape allows the grommet to seat into a drilled hole with the lip resting flush against the panel surface, creating a tight seal while the stem passes through the hole to secure it in place. When made from silicone rubber, this grommet type offers excellent flexibility, elasticity, and resistance to shock, moisture, dust, and chemical exposure.
Full Size Chart
| Opening Size (mm) | Groove Thickness (mm) | Cap Thickness (mm) | Inner Diameter (mm) | Cap Diameter (mm) |
|---|---|---|---|---|
| 3.3 | 2.6 | 0.9 | 1.5 | 4.7 |
| 5.5 | 7 | 2 | 2 | 8.5 |
| 6.5 | 7 | 2 | 4 | 9.5 |
| 8.5 | 8 | 2 | 5 | 11.5 |
| 10.5 | 9 | 2 | 6 | 13.5 |
| 12.5 | 10 | 2 | 8 | 15.5 |
| 15.5 | 10 | 3 | 10 | 20 |
| 15.8 | 10 | 4 | 6 | 24 |
| 17 | 10 | 4.5 | 7 | 25 |
| 18 | 10 | 3.7 | 8 | 26 |
| 19 | 10 | 4 | 9 | 27 |
| 20 | 9.8 | 4 | 11 | 29 |
| 21 | 9.8 | 4 | 11 | 29 |
| 22 | 9.7 | 4.1 | 12 | 29 |
| 23 | 9.7 | 5.3 | 13 | 33 |
| 23.8 | 10 | 4 | 12 | 31 |
| 25 | 10 | 4 | 15 | 35 |
| 26 | 10 | 4 | 16 | 33 |
| 27 | 9.5 | 4 | 17 | 34 |
| 28 | 10 | 3.5 | 18 | 35 |
| 29 | 10 | 3.5 | 18 | 36 |
| 30.3 | 10 | 3.5 | 20 | 36 |
| 31.3 | 10 | 3.5 | 21 | 37 |
| 32 | 10 | 3.5 | 21 | 37 |
| 33.3 | 12 | 3.5 | 22 | 38 |
| 34.3 | 12 | 3.9 | 23 | 41.5 |
| 36.3 | 12.5 | 4 | 25 | 42 |
| 37.3 | 11.6 | 3.8 | 26 | 43.5 |
| 39.3 | 13 | 3.8 | 28 | 45 |
| 41.3 | 11.8 | 3.8 | 29 | 48 |
| 43.5 | 11 | 3.5 | 33 | 49 |
| 46.3 | 13.5 | 4 | 33 | 52 |
| 48.5 | 12 | 3.8 | 38 | 54 |
| 49.8 | 11.6 | 3.9 | 40 | 54 |
| 51.3 | 12.1 | 3.7 | 40 | 57 |
| 52.5 | 11 | 3.8 | 45 | 57.5 |
| 53.6 | 14 | 3.5 | 42 | 60 |
| 56.3 | 12 | 3.5 | 44 | 62 |
| 58.6 | 14 | 3.5 | 47 | 65 |
| 61.3 | 12 | 3.5 | 49 | 67 |
| 63.6 | 14 | 3.5 | 52 | 70 |
| 68.6 | 14 | 3.5 | 57 | 75 |
| 71.3 | 12 | 3.5 | 59 | 77 |
| 73.6 | 14 | 3.5 | 62 | 80 |
| 76.8 | 12 | 3.5 | 64 | 82 |
| 78.6 | 14 | 3.5 | 67 | 85 |
| 81.3 | 12 | 3.6 | 68 | 87 |
| 83.6 | 14 | 3.5 | 72 | 90 |
| 86.3 | 12 | 3.5 | 74 | 92 |
| 88.6 | 14 | 3.5 | 77 | 95 |
| 91.3 | 14 | 3.5 | 78 | 97 |
| 93.6 | 14 | 3.5 | 82 | 101 |
| 96.3 | 14 | 3.5 | 83 | 102 |
| 98.6 | 14 | 5 | 86 | 105 |
| 101.5 | 15 | 4 | 85 | 114 |
| 103.6 | 15 | 5 | 90 | 112 |
| 106.5 | 15 | 5 | 89 | 115 |
| 108.5 | 15 | 5 | 96 | 117 |
| 111.5 | 15 | 5.2 | 94 | 120 |
| 113.6 | 15 | 5.2 | 101 | 123 |
| 116.5 | 15.5 | 5 | 100 | 125 |
| 121.5 | 15 | 5 | 104 | 130 |
| 126.5 | 15 | 5 | 109 | 135 |
| 131.5 | 15 | 5 | 109 | 135 |
| 136.5 | 15 | 5 | 119 | 145 |
| 141.5 | 18 | 5 | 127 | 150 |
| 146.5 | 18 | 5 | 129 | 150 |
| 151.5 | 18 | 5 | 134 | 160 |
| 156.5 | 18 | 5 | 139 | 165 |
| 161.5 | 18 | 5 | 144 | 170 |
| 166.5 | 18 | 5 | 149 | 179 |
| 171.5 | 18 | 5 | 154 | 180 |
| 176.5 | 18 | 5 | 159 | 182 |
| 181.5 | 18 | 5 | 160 | 190 |
| 186.5 | 18 | 5 | 169 | 198 |
| 191.5 | 18 | 5 | 173 | 201 |
| 196.5 | 18 | 5 | 182 | 207 |
| 201.5 | 18 | 5 | 184 | 210 |
Note: All dimensions are manually measured and may have slight tolerance; actual product dimensions prevail.
Key Properties
- Acid and alkali resistant, suitable for exposure to mild chemical environments.
- Corrosion resistant, maintaining performance in humid or wet conditions.
- Impact resistant, absorbing shock at cable and panel entry points.
- Waterproof and dustproof sealing performance around cable or pipe pass-throughs.
- T-shaped profile provides a secure mounting fit combined with an effective sealing edge.
- Extremely wide size range, from small 3.3 mm openings up to large 201.5 mm openings.
Silicone vs Standard Rubber T-Grommets
| Feature | Silicone T-Grommet | Standard Rubber (SBR/NBR) T-Grommet |
|---|---|---|
| Temperature Range | Wider, better high/low heat tolerance | Narrower range, general purpose |
| Chemical Resistance | Acid/alkali and corrosion resistant | Moderate |
| Impact Resistance | Strong | Adequate |
| Water/Dust Sealing | Strong | Adequate for general use |
| Typical Cost | Higher | Lower |
Common Applications
- Wire and cable pass-through sealing in electronic enclosures.
- Automotive and vehicle wiring harness protection.
- Household appliance panel wiring.
- Chemical or corrosive environment cable and pipe seals.
- Industrial machinery and equipment cable entry points.
- Valve, pipe repair, and general household bushing needs.
Sizing and Selection Guide
Silicone T-shaped grommets in this range are specified by opening size, groove thickness, cap thickness, inner diameter, and cap diameter, since the T-profile relies on precise dimensions to create a proper seal at the mounting hole. Selecting the correct inner diameter is important so the grommet grips the cable or pipe snugly without excessive stretching, which could reduce its sealing effectiveness over time. Because measurements are taken manually, a small tolerance should be allowed and actual product dimensions should be confirmed before finalizing an order.
Custom Manufacturing Options
- Custom opening size, inner diameter, and cap diameter beyond the standard chart.
- Silicone rubber compound formulated for specific chemical or temperature resistance needs.
- Custom colors including black, transparent, and other tones.
- FDA, RoHS, and REACH compliant grades available.
- OEM tailored shapes and private-label packaging.
FAQ
What are silicone T-shaped rubber grommets used for?
Silicone T-shaped rubber grommets are used to protect cables, wires, tubes or rods passing through panel openings. They can also support edge isolation, dust reduction, positioning and light sealing functions when the grommet profile matches the panel hole and installation conditions.
Can the T-shaped grommet dimensions be customized?
Yes. Flange diameter, stem diameter, inner diameter, overall height, wall thickness and panel fit can be customized according to drawings or samples. Unsupported dimensions should not be assumed because panel retention, compression and sealing behavior depend on confirmed size data.
How should buyers select the silicone compound?
Silicone compound selection depends on operating temperature, contact media, cleaning process, flexibility requirement, compression condition and documentation needs. Buyers should provide the application environment, panel material, cable or tube material and exposure conditions before material approval.
Are silicone T-shaped grommets suitable for sealing?
They can provide basic sealing or dust protection when the profile, compression and panel fit are suitable. For demanding water, pressure or airtight sealing, buyers should provide the required sealing level, installation design and test conditions for technical review.
Is tooling required for custom silicone T-shaped grommets?
Tooling is usually required for molded silicone grommets with a custom T-shaped profile, non-standard hole size or specific flange structure. Tooling cost depends on the drawing and product structure. Existing tooling options can be reviewed after receiving the required dimensions.
Are samples available before bulk production?
Samples are available upon request. Sample preparation depends on the grommet size, silicone compound, hardness, color, tooling status and inspection requirements. A drawing, 3D model, panel specification or physical sample helps confirm the correct structure before batch production.
Request a Custom Quote
Send your silicone T-shaped rubber grommet drawing, 3D model, panel specification or physical sample for review. Please include flange size, stem size, inner diameter, panel hole diameter, panel thickness, material, hardness, color, quantity, application environment and packaging requirements.
