Value Collection ZMSCH90008 O-ring Dash 008 Nbr 90 Duro

Product Description

The VALUE COLLECTION ZMSCH90008 is a Dash 008 Buna-N (Nitrile Butadiene Rubber) O-ring rated at 90 durometer hardness, packaged in quantities of 100. It measures 0.188 inches inside diameter, 0.3130 inches outside diameter, and 0.0625 inches thick with a round cross-section profile. Rated for use from -40 degrees F to 250 degrees F, this O-ring delivers reliable sealing performance in applications involving petroleum-based fluids and hydraulic media. Licensed HVAC technicians, plumbers, and fluid system mechanics commonly use Dash 008 O-rings when servicing valves, fittings, and low-pressure hydraulic connections.

This O-ring is suited for residential and commercial applications wherever a Dash 008 NBR seal is required. Typical uses include refrigeration service valves, plumbing fittings, hydraulic couplings, and pneumatic connectors that contact petroleum-based fluids or oils. The extra-hard 90 durometer rating makes it appropriate where extrusion resistance under pressure is a priority. The 100-piece pack supports service fleets and shop stock requirements. These O-rings conform to SAE and MIL-Spec standards, making them appropriate for both commercial service and light industrial use.

Key Features

• Buna-N (NBR) elastomer with excellent resistance to petroleum products, oils, and fuels
• 90 durometer hardness rating — extra-hard grade for extrusion resistance under pressure
• Operating temperature range: -40 degrees F to 250 degrees F
• Round cross-section; Dash 008 sizing (0.188 inches ID x 0.3130 inches OD x 0.0625 inches thick)
• Meets SAE and MIL-Spec standards
• Good tear and abrasion resistance with excellent compression set characteristics

Compatibility

Designed as a standard Dash 008 O-ring replacement compatible with petroleum-based fluid systems, hydraulic fittings, and pneumatic connectors that specify Buna-N NBR seals at 90 durometer hardness.

Installation Notes

Installation should be performed by a qualified technician familiar with the system being serviced. Always depressurize and isolate the system before removing or replacing O-rings. Lubricate the O-ring with a compatible fluid or grease before seating to prevent tearing during installation. Do not store unused O-rings in direct sunlight or near motors and electrical equipment that may generate ozone, as this degrades NBR elastomer over time.