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Upgrade your industrial, automotive, or DIY projects with our professional-grade 7mm Cross Section NBR O-Rings! Engineered from high-quality Nitrile Rubber (Buna-N), these thick-section seals deliver unbeatable reliability against oils, fuels, water, and wear. Perfect for demanding applications where failure is not an option.
🌟 Key Advantage: With a wide operating range from -40°F to +248°F (-40°C to +120°C) and superior extrusion resistance, these 7mm thick O-rings perform consistently in freezing conditions and high-temperature industrial environments alike.
| Material | Nitrile Rubber (NBR / Buna-N) – Industry standard for oil and fuel resistance. |
|---|---|
| Cross Section (Thickness) | 7mm (0.276") – Heavy-duty profile for high-pressure and large clearance applications. |
| Outer Diameter (OD) Range | Approx. 30mm (1.18") to 754mm (29.69") – A comprehensive kit covering numerous sizes. |
| Hardness (Durometer) | Shore 70A – Optimal balance of sealing force and flexibility. |
| Temperature Range | -40°F to +248°F (-40°C to +120°C) – Suitable for extreme environments. |
| Key Features & Resistance | Excellent resistance to petroleum oils, fuels, water, and hydraulic fluids. Good abrasion & compression set resistance. Reliable sealing under pressure. |
This robust 7mm cross-section O-ring is designed for heavy-duty sealing tasks across multiple sectors:
Yes, absolutely. The 7mm cross-section is specifically chosen for high-pressure applications. It provides significantly greater resistance to extrusion and blow-out compared to standard thinner O-rings, making it an excellent choice for hydraulic cylinders and industrial fluid power systems.
You need two measurements: Cross Section (7mm) and Inner Diameter (ID) or Outer Diameter (OD). Measure the groove where the seal will sit. Our wide OD range (30mm-754mm) ensures a fit for most applications. If replacing an old O-ring, match its dimensions. For grooves, the ID is typically the critical measurement.
Yes. NBR (Nitrile) rubber is renowned for its excellent resistance to petroleum-based products, including gasoline, diesel, and motor oils. These 7mm oil-resistant seals will maintain their sealing properties and physical integrity during prolonged exposure to common fuels and lubricants.
7mm O-rings offer distinct advantages: Superior extrusion resistance in high-pressure or large-gap applications, longer service life in dynamic settings due to more material to wear, and better compensation for gland wear, surface imperfections, or misalignment. They are the go-to for heavy industrial use.
We provide competitive pricing for bulk quantities. Our extensive 7mm NBR O-ring collection is ideal for maintenance shops, factories, and fleet services. For very large or custom-size inquiries, please contact us directly through the store to discuss your specific volume and requirements.
