Value Collection ZMSCH70210 O-ring Dash 210 Nbr 3/4 in Id

Product Description

The VALUE COLLECTION ZMSCH70210 is a Dash 210 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in fluid sealing applications. It measures 0.75 inches inside diameter, 1.0 inches outside diameter, and 0.125 inches thick with a round cross section and a Shore A hardness of 70. Rated for service from -40 degrees F to 250 degrees F, this O-ring delivers reliable sealing performance in systems that handle petroleum-based fluids, hydraulic oil, and related media. Licensed plumbers, HVAC technicians, and hydraulic system technicians commonly spec this size for valve, fitting, and pump seal applications.

The ZMSCH70210 is suited for residential and commercial installations where Dash 210 seals are required in petroleum-compatible fluid circuits. Typical applications include hydraulic cylinders, control valves, pump housings, fittings, and plumbing shut-off assemblies. The Buna-N compound resists compression set and provides good tear and abrasion resistance, making it a practical choice for recurring maintenance kits and service inventory. This listing is packaged in a quantity of 100 units, supporting shop stock and job-site supply needs.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction with excellent resistance to petroleum products
• Dash 210 standard sizing: 0.75 inches ID, 1.0 inches OD, 0.125 inches cross-section thickness
• Shore A hardness of 70 — hard rating for positive compression seal under pressure
• Operating temperature range: -40 degrees F to 250 degrees F
• Round cross section; black color; meets SAE and MIL-Spec standards
• Resistant to tear and abrasion; excellent compression set characteristics

Compatibility

Compatible with petroleum products and petroleum-based hydraulic fluids as noted by the manufacturer. Designed as an OEM-style replacement or service seal for any application calling for a standard Dash 210 Buna-N O-ring. Not recommended for use with ozone-generating environments, direct sunlight exposure, or incompatible solvents.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or hydraulic equipment technicians. Always depressurize and drain the system before removing or installing O-rings to prevent fluid release and injury. Lightly lubricate the O-ring with a compatible fluid or assembly grease before seating to avoid nicking or rolling during installation. Do not store O-rings near motors, electrical equipment, or direct sunlight, as ozone and UV exposure degrade Buna-N compounds over time.