Usa Industrials ZUSAH70011 Nitrile O-ring Dash 011 70 Duro

Product Description

The USA INDUSTRIALS ZUSAH70011 is a Buna-N nitrile O-ring in the standard Dash 011 size, measuring 0.301 inches inside diameter, 0.441 inches outside diameter, and 0.0625 inches thick with a round cross section. Rated at 70 Shore A durometer, this O-ring delivers the firm, reliable sealing performance that HVAC, plumbing, and fluid-system technicians depend on. Operating temperature range spans -40 degrees F to 250 degrees F. Buna-N is the most widely used O-ring elastomer in the trade, valued for its excellent resistance to petroleum-based fluids and its strong compression set recovery. Each package contains 100 O-rings.

This O-ring is suited for static and dynamic sealing applications in residential and commercial systems where exposure to petroleum products, hydraulic fluids, oils, and fuels is expected. Typical applications include valves, fittings, pumps, compressors, and fluid-handling assemblies. It is appropriate for use in HVAC refrigerant service fittings, plumbing shutoff valves, and pool equipment where a Dash 011 nitrile seal is specified. The black Buna-N compound is not recommended for use with ozone-generating equipment, strong UV exposure, or non-petroleum-compatible media such as brake fluid or ketones.

Key Features

• Buna-N nitrile elastomer - the most common O-ring material in plumbing, HVAC, and fluid-system service
• 70 Shore A durometer hardness rated Hard for firm compression and reliable sealing
• Operating range of -40 degrees F to 250 degrees F covers most mechanical and HVAC service conditions
• Excellent resistance to petroleum products, oils, and hydraulic fluids
• Round cross section with consistent 0.0625-inch thickness for uniform gland fit
• Conforms to ASTM 568 dimensional standards
• Package of 100 units supports shop stock and field service kits

Compatibility

Designed for use in applications requiring a Dash 011 nitrile O-ring compatible with petroleum products. Not approved for FDA food-contact applications. Should not be used with ozone, strong oxidizers, or non-petroleum-compatible fluids.

Installation Notes

Installation should be performed by a qualified technician familiar with the equipment being serviced. Shut off and relieve all pressure from the system before removing or replacing seals. Lightly lubricate the O-ring with a compatible petroleum-based or silicone grease before installation to ease seating and prevent tearing during assembly. Do not store Buna-N O-rings near motors, electrical equipment, or in direct sunlight, as ozone and UV exposure degrade the elastomer over time.