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RS Pro Nitrile Rubber (NBR) Bonded Seal Bonded Washer 21.54 mm ID 28.58 mm OD 689-495

Category Seals & Gaskets Brand RS PRO Condition New

Specifications

Country of Origin United Kingdom
Brand RS Pro
Material Nitrile Rubber (NBR)
THICKNESS 2.5mm
Model 689-495
Outside diameter 28.58mm
Maximum Operating Temperature 80°C
Hardness Shore 70
Sub Type Bonded Seal
Inside Diameter 21.54mm
Minimum Operating Temperature -10°C
Standards/Approvals cUR, CE, UR

Key Features

  • Constructed with a metal annulus bonded to a medium nitrile elastomeric ring for durability.
  • Hardness rated at Shore 70 for optimal sealing performance.
  • Suitable for high and low pressure applications involving mineral-based hydraulic fluids or engine oils.
  • Operates reliably between -10°C and 80°C temperature range.
  • Available in both metric and BSP-based Imperial sizes for versatile use.
  • Meets standards including cUR, CE, and UR certifications.
  • Ideal for automotive, plumbing, aerospace, and general engineering applications.
  • Designed as a bonded washer for sealing under bolt heads, threaded components, pipe couplings, and connectors.

Product Description

RS Pro 689-495 Nitrile Rubber (NBR) Bonded Seal Bonded Washer features a metal annulus bonded with an elastomeric nitrile rubber ring of trapezoidal cross-section ensuring a robust seal.

The washer has an inside diameter of 21.54 mm and an outside diameter of 28.58 mm with a thickness of 2.5 mm. It is engineered to operate effectively in temperatures ranging from -10°C to 80°C and has a Shore 70 hardness rating, suitable for sealing fluid system ports carrying mineral-based hydraulic fluids or engine lubricating oils.

This bonded seal is applicable for various industrial use cases including automotive, plumbing, aerospace, and general engineering, offering reliable high and low-pressure sealing performance.

The product is compliant with cUR, CE, and UR certifications, reflecting adherence to strict quality and safety standards. The bonded washer design is effective for sealing under bolt heads, threaded components, pipe connections, and couplings where tight sealing against gases, fluids, or oils is required.

RS Pro offers a wide range of bonded seals in both metric and BSP-based Imperial sizes, ensuring compatibility with modern and existing equipment maintenance requirements. Constructed to provide high durability under pressure.

Medium hardness elastomeric ring bonded to metal annulus. Wide operating temperature range for versatile applications. Standards compliant for assured quality and safety. Suitable for automotive, aerospace, plumbing, and engineering sectors.

Designed for sealing in mechanical and fluid power systems. Available in sets or individual units for maintenance and repairs. Manufactured in the United Kingdom with precision standards.

This RS Pro bonded seal is a reliable component for sealing applications requiring robustness and precision, enhancing system integrity in industrial and commercial installations. Explore more high-quality sealing solutions in the Gaskets & O-Rings category on EnvMart.

Explore more products in our Seals & Gaskets category.

RS Pro Nitrile Rubber (NBR) Bonded Seal Bonded Washer 21.54 mm ID 28.58 mm OD 689-495
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Frequently Asked Questions

The bonded seal has an inside diameter of 21.54 mm, an outside diameter of 28.58 mm, and a thickness of 2.5 mm.

It has a hardness rating of Shore 70, which is suitable for optimal sealing performance.

The maximum operating temperature for this bonded seal is 80°C.

This bonded seal operates effectively at a minimum temperature of -10°C.

It is constructed with a metal annulus bonded to a medium nitrile elastomeric ring.

The bonded seal complies with cUR, CE, and UR certifications, ensuring adherence to quality and safety standards.

It is suitable for automotive, plumbing, aerospace, and general engineering applications, providing reliable sealing performance.

This model is designed for high and low-pressure applications, effectively sealing fluid system ports carrying mineral-based hydraulic fluids or engine oils.

Yes, it is available in both metric and BSP-based Imperial sizes to ensure compatibility with various equipment.

It is manufactured in the United Kingdom, adhering to precision standards.

The primary function is to provide a reliable seal under bolt heads, threaded components, pipe couplings, and connectors to prevent leaks.

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