Value Collection ZMSCH70MD020 Nbr O-ring Dash 020 Pack 25

Product Description

The VALUE COLLECTION ZMSCH70MD020 is a Dash 020 nitrile butadiene rubber (NBR) O-ring with a round cross section, sized at 0.864 inches inside diameter and 1.000 inches outside diameter with a 0.0625-inch (1/16 inch) thickness. Rated at 70 Shore A hardness, this O-ring is designed to seal against petroleum-based fluids and operates across a temperature range of -40 degrees F to 250 degrees F. It is the most widely used O-ring elastomer type in trade applications, offering excellent resistance to petroleum products, good compression set characteristics, and strong tear and abrasion resistance. Sold in a pack of 25 units. Total package weight is 0.221 pounds.

This O-ring is suited for use in HVAC, plumbing, refrigeration, and general mechanical systems where petroleum-based fluid compatibility is required. Typical install scenarios include sealing fittings, valves, pumps, compressors, and hydraulic or pneumatic connections in both residential and light commercial equipment. The NBR material makes it a standard choice for refrigerant oil circuits, fuel lines, and hydraulic assemblies. Note that this part is not FDA approved for food-contact applications, though the supplier data references a metal-detectable FDA grade variant designation.

Key Features

• NBR elastomer construction — excellent resistance to petroleum products and mineral oils
• 70 Shore A hardness rating — classified as hard, suitable for moderate-pressure sealing applications
• Operating temperature range: -40 degrees F to 250 degrees F
• Round cross section, Dash 020 sizing: 0.864 inches ID, 1.000 inches OD, 0.0625 inches thick
• Strong tear and abrasion resistance for long service life in dynamic and static seal applications
• Store away from direct sunlight, ozone sources, and electrical motors to prevent premature degradation

Compatibility

Compatible with petroleum products and mineral oil-based fluids. Designed as a standard Dash 020 NBR O-ring for use in systems requiring a 0.864-inch ID round cross-section seal. Not recommended for use with ozone, strong acids, ketones, esters, or chlorinated solvents.

Installation Notes

O-rings in this size class are typically installed by licensed HVAC technicians, plumbers, or mechanical service professionals. Always depressurize and isolate the system section before removing or installing seals. Lightly lubricate the O-ring with a compatible fluid or O-ring lubricant prior to installation to prevent pinching or tearing during seating. Do not overstretch the ring during installation, and inspect the seating groove for burrs or damage before fitting.