Value Collection ZMSCH70273 O-ring Dash 273 Nbr

Product Description

The VALUE COLLECTION ZMSCH70273 is a Dash 273 O-ring made from Nitrile Butadiene Rubber (NBR), also known as Buna-N, one of the most widely used elastomers in fluid sealing applications. This O-ring measures 9.75 inches inside diameter, 10 inches outside diameter, and 0.125 inches thick with a round cross section. It carries a hardness rating of 70 Shore A, placing it in the hard range, which supports reliable compression set resistance under sustained load. Plumbers, HVAC technicians, and industrial maintenance professionals install this part wherever a large-diameter static or dynamic seal is required against petroleum-based fluids.

This O-ring is suited for residential and commercial plumbing, HVAC, and general industrial systems where petroleum-based fluid compatibility is a primary requirement. Its Buna-N compound delivers strong resistance to oils, fuels, and hydraulic fluids across a working temperature range of -40 degrees F to 250 degrees F. Typical installation scenarios include large-bore valve bodies, pump housings, filter housings, and equipment flanges. This part is packaged in a quantity of 5 per package.

Key Features

• Nitrile Butadiene Rubber (Buna-N) construction - the most widely used O-ring elastomer for petroleum product exposure
• 9.75 inches inside diameter and 10 inches outside diameter for large-bore sealing applications
• 0.125 inches cross-section thickness, round profile, Dash 273 standard sizing
• 70 Shore A hardness rating provides excellent compression set and tear and abrasion resistance
• Operating temperature range from -40 degrees F to 250 degrees F
• Meets SAE and MIL-Spec standards

Compatibility

Compatible with petroleum products including oils, fuels, and hydraulic fluids. Not recommended for exposure to ozone, direct sunlight during storage, or environments near motors and other electrical equipment that generate ozone. Not FDA approved.

Installation Notes

This O-ring is installed by licensed plumbers, HVAC technicians, or qualified maintenance technicians. Always shut off and depressurize the system fully before removing or installing sealing components. Inspect the mating groove and sealing surfaces for damage or debris before seating the O-ring. Avoid rolling or twisting the O-ring during installation to prevent premature failure.