Value Collection ZMSCH70MD333 O-ring Dash 333 Nbr

Product Description

The VALUE COLLECTION ZMSCH70MD333 is a Dash 333 O-ring made from Nitrile Butadiene Rubber (NBR), also known as Buna-N, one of the most widely used elastomers in sealing applications. It features a 2.475-inch inside diameter, a 2.875-inch outside diameter, and a 3/16-inch (0.1875-inch) cross section thickness. The round cross section and hard durometer rating (Shore A 70) deliver reliable compression set and sealing performance. This O-ring resists petroleum-based fluids, making it a standard choice for hydraulic, pneumatic, and fluid-handling assemblies across HVAC, plumbing, and industrial service work.

This O-ring is suited for use in static and dynamic sealing applications where exposure to petroleum products, oils, and fuels is expected. Typical install scenarios include hydraulic cylinder seals, pump seals, valve stems, and pipe fittings in residential and light commercial systems. It is rated for continuous service from -40 degrees F to 250 degrees F, making it appropriate for a broad range of operating environments encountered in trade service work. Each package contains 2 O-rings.

Key Features

• Buna-N (NBR) material offers excellent resistance to petroleum products, oils, and fuels
• Shore A 70 hardness rating provides reliable sealing under compression
• Rated from -40 degrees F to 250 degrees F for wide temperature range compatibility
• Round cross section ensures consistent seating in standard O-ring grooves
• Strong tear and abrasion resistance extends service life in dynamic applications
• Should not be stored in direct sunlight or near ozone-generating equipment such as motors

Compatibility

Designed for use in standard Dash 333 O-ring groove applications where Buna-N material is appropriate. Compatible with petroleum-based fluids, oils, and fuels. Not FDA approved for food-contact use, though additional metal-detectable FDA information is noted by the manufacturer.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or hydraulic system technicians. Depressurize and isolate the system before removing old seals. Lubricate the O-ring with a compatible fluid or approved O-ring lubricant before seating to prevent damage during installation. Inspect the groove for burrs or corrosion that could compromise the seal.