Value Collection ZMSCH90018 O-ring Dash 018 Nbr 90 Duro 100pk

Product Description

The VALUE COLLECTION ZMSCH90018 is a Dash 018 Buna-N (Nitrile Butadiene Rubber) O-ring rated at 90 durometer hardness, sold in a package of 100 pieces. It measures 0.75 inches inside diameter, 0.875 inches outside diameter, and 0.0625 inches thick with a round cross section. Rated for service from -40 degrees F to 250 degrees F, this extra-hard NBR compound delivers excellent resistance to petroleum-based fluids, oils, and fuels. It also provides strong compression set performance along with good tear and abrasion resistance. Licensed plumbers, HVAC technicians, and maintenance mechanics reach for Buna-N O-rings as the standard general-purpose seal for fluid and pneumatic systems.

This O-ring is suited for residential and commercial plumbing, HVAC refrigerant-adjacent components, hydraulic fittings, pneumatic cylinders, and fuel-handling assemblies where petroleum-product exposure is routine. The Dash 018 designation is a widely referenced AS568 standard size, making this ring a common replacement seal in valves, unions, fittings, and pump housings across a broad range of trade applications. The 100-piece pack format is practical for shop stock and service trucks that regularly service systems requiring this size.

Key Features

• Buna-N (NBR) elastomer with excellent petroleum product resistance
• 90 durometer extra-hard rating for high-pressure sealing applications
• Operating range of -40 degrees F to 250 degrees F
• Dash 018 designation per AS568 standard sizing
• Round cross section, 0.0625 inches thick, for consistent groove fit
• Meets SAE and MIL-Spec standards
• 100-piece package quantity for shop stock and field service use

Compatibility

Compatible with petroleum products, oils, fuels, and hydraulic fluids. Designed as a standard Dash 018 AS568-size replacement O-ring for valves, fittings, pump housings, and similar components in plumbing, HVAC, and fluid-handling systems. Not FDA approved; not intended for food-contact or potable-water applications without independent verification of code compliance.

Installation Notes

Installation should be performed by a qualified plumber, HVAC technician, or mechanic. Shut off and depressurize the system fully before removing or replacing any O-ring seal. Lightly lubricate the O-ring with a compatible petroleum-based or synthetic lubricant before seating to prevent tearing during assembly. Avoid storing unused O-rings in direct sunlight or near motors and other electrical equipment that may generate ozone, as ozone exposure degrades NBR compounds over time.