Value Collection ZMSCH70333 O-ring Dash 333 Nbr 2.5 in Id

Product Description

The VALUE COLLECTION ZMSCH70333 is a Dash 333 Nitrile Butadiene Rubber (NBR) O-ring designed for use in fluid and pneumatic sealing applications across plumbing, HVAC, and industrial systems. It measures 2.5 inches inside diameter, 2.875 inches outside diameter, and 0.1875 inches thick with a round cross section. Rated at 70 Shore A hardness, this O-ring carries a working temperature range of -40 degrees F to 250 degrees F, making it suitable for a broad range of service environments. NBR is the most widely used O-ring elastomer and provides strong resistance to petroleum-based fluids, compression set, tearing, and abrasion.

This O-ring is suited for residential and commercial service work where a standard Dash 333 size is required. Typical applications include pipe unions, valve bodies, pump housings, and fittings that contact petroleum-based lubricants or hydraulic fluids. The black NBR compound is compatible with petroleum products and performs reliably across moderate temperature ranges. It is commonly installed by licensed plumbers, HVAC technicians, and industrial maintenance technicians during equipment service or preventive maintenance. Each package contains 25 O-rings, making it practical for shops and service fleets that replace seals in volume.

Key Features

• Dash 333 standard size: 2.5 inches ID, 2.875 inches OD, 0.1875 inches thick
• NBR compound offers excellent resistance to petroleum products, oils, and hydraulic fluids
• 70 Shore A hardness rating provides a firm yet compressible seal under typical clamping loads
• Operating range of -40 degrees F to 250 degrees F covers most HVAC and plumbing service conditions
• Round cross section ensures consistent sealing contact in standard O-ring grooves
• Meets SAE and MIL-Spec standards

Compatibility

Designed as a standard Dash 333 O-ring replacement compatible with petroleum products and hydraulic fluids; suitable for any application requiring a 2.5 inches ID NBR O-ring conforming to SAE and MIL-Spec standards.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, or qualified maintenance personnel. Depressurize and drain the system completely before removing the old O-ring, and inspect the groove for scoring or corrosion that could prevent a proper seal. Lightly lubricate the O-ring with a compatible fluid or grease before seating it to avoid pinching or rolling during assembly. Store unused O-rings away from direct sunlight, ozone sources, and electric motors, which can degrade NBR compound over time.