ð§ Metric EPDM Rubber O Ring Seals 5.30mm Cross Section 18mm - 580mm ID BS102-BS125
These standard metric EPDM rubber O-rings feature a 5.30mm cross-section, covering inner diameter sizes from 18mm to 580mm under BS102 to BS125 specification series. Made of black EPDM compound with 70A shore hardness, they deliver stable sealing performance across a wide temperature spectrum and excellent anti-aging properties, widely used for automotive, construction, electrical and hydraulic sealing applications.
â Main Features & Advantages of 5.30mm Cross Section EPDM O-Rings
- âïļ Superior Weathering Resistance: Outstanding ozone resistance, UV shielding and long-term anti-aging performance for outdoor exposure scenarios.
- ⥠Excellent Electrical Insulation: Stable insulating property and reliable chemical inertness for electrical equipment sealing.
- ðŠķ Low Specific Gravity & High Fillability: Light weight base material, compatible with high filler formulation to balance cost and sealing performance.
- ðĄïļ Broad Operating Temperature Range: Maintain stable elasticity from -50°C (-58â) up to 150°C (302â).
- ðĄïļ 70A Shore Hardness: Moderate hardness with great penetration resistance, balanced compression and rebound resilience.
- ð Complete BS Metric Sizes: 5.30mm wire cross-section, inner diameter range 18mm–580mm, conforming to BS102-BS125 standard series.
- âŦ Uniform Black EPDM Compound: Consistent color and texture for uniform sealing effect during long-term service.
ð Full Product Technical Specifications
| Measurement Unit | Metric (mm) |
|---|---|
| Color | Solid Black |
| Raw Material | EPDM (Ethylene Propylene Diene Monomer) Rubber |
| Shore Hardness | 70A Durometer, good penetration resistance |
| Working Temperature | -58â (-50â) ~ 302â (150â) |
| Size Naming Rule | Outer Diameter * Inner Diameter * Cross Section (Wire Diameter) |
| Cross Section Size | 5.30mm |
| Inner Diameter Coverage | 18mm ~ 580mm, BS102-BS125 standard series |
| Core Performance Strengths | Ozone, UV & aging resistant; high insulation, stable chemical property |
| Material Limitations | Average oil resistance; poor tolerance to strong polar solvents and corrosive chemicals |
â Frequently Asked Questions
ð What fields are these EPDM O-rings suitable for?
They are widely applied to automotive sealing components, building weatherproof sealing gaskets, electrical insulation parts, hydraulic assembly fittings and various mechanical static & dynamic sealing joints.
ðĒïļ Can these EPDM O-rings be used for engine oil sealing?
EPDM only has average oil resistance, so it is not recommended for long-term immersion in mineral oil, engine oil and similar oily media. NBR nitrile O-rings are more suitable for oil sealing working conditions.
ð§ïļ Are these O-rings suitable for long-term outdoor use?
Yes. EPDM’s premium UV and ozone resistance prevents cracking and hardening under long-term sunlight, rain and temperature fluctuations, ideal for outdoor pipeline and cabinet sealing.
ð Important Pre-Purchase & Installation Note
Please double-check your required inner diameter, cross-section size and working medium compatibility before placing orders. Install the O-ring into the matching groove correctly to avoid premature leakage and damage.
ð Why Choose Our Metric 5.30mm Cross Section EPDM O-Rings?
Our BS standard EPDM rubber O-rings adopt 70A hardness EPDM raw material with premium anti-UV, anti-ozone and wide-temperature performance, perfectly matching outdoor, electrical and water-based sealing working conditions. Covering full BS102-BS125 metric sizes with 5.30mm wire diameter and 18–580mm inner diameter options, these black O-rings deliver stable insulation and weatherproof sealing. Note that they are not ideal for heavy oil or strong solvent environments; confirm your working medium and dimensions beforehand to get the optimal long-lasting sealing solution for automotive, construction and hydraulic equipment.
On 02-Jul-2026 at 03:42:30 BST, seller added the following information: