Value Collection ZMSCH70435 O-ring Dash 435 Nbr Pack of 5

Product Description

The VALUE COLLECTION ZMSCH70435 is a Dash 435 Nitrile Butadiene Rubber (NBR) o-ring with a 5.75 inches inside diameter, 6.25 inches outside diameter, and 0.25 inches cross-section thickness. It features a round cross-section profile and a Shore A hardness of 70, placing it in the hard hardness rating category. Buna-N is the most widely used o-ring elastomer in trade applications, selected for its excellent resistance to petroleum-based fluids, strong compression set recovery, and solid tear and abrasion resistance. This o-ring ships in a pack of 5.

This o-ring is suited for static and dynamic sealing applications involving petroleum products, hydraulic fluids, and oils across HVAC, plumbing, and general industrial service. It is appropriate for use in fluid system fittings, valve bodies, pump housings, and pipe connections where a large-diameter face or radial seal is required. The operating temperature range of -40 degrees F to 250 degrees F makes it a reliable choice for a wide range of indoor and outdoor service conditions. It meets SAE and MIL-Spec standards. Note that this part is not FDA approved and should not be used in food-service or potable-water contact applications.

Key Features

• Buna-N (NBR) elastomer provides excellent resistance to petroleum products, hydraulic oils, and fuels
• Round cross-section profile with 0.25 inches section thickness for consistent seating and sealing
• Shore A hardness of 70 (hard rating) for reliable compression set performance
• Operating temperature range: -40 degrees F to 250 degrees F
• Meets SAE and MIL-Spec standards
• Store away from direct sunlight, ozone sources, and electrical equipment that may generate ozone

Compatibility

Designed as an OEM-style replacement or service o-ring for Dash 435 groove specifications in petroleum-compatible fluid systems, valves, pumps, and fittings requiring a 5.75 inches ID sealing element.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or fluid system mechanics. Always depressurize and drain the system before removing the existing seal. Lightly lubricate the o-ring with a compatible petroleum-based or synthetic grease before seating it to prevent rolling or tearing during assembly. Inspect the groove for scoring or contamination before installing the new ring.