Value Collection ZMSCH70144 O-ring 2.5 in Id Nitrile Dash 144

Product Description

The VALUE COLLECTION ZMSCH70144 is a Dash 144 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer for fluid sealing applications in trade and industrial service. This O-ring measures 2.5 inches inside diameter, 2.688 inches outside diameter, and 0.0937 inches thick with a round cross section. It carries a hardness rating of 70 Shore A, placing it in the hard range for reliable compression set resistance. Plumbers, HVAC technicians, and mechanical contractors install this type of O-ring to seal hydraulic, pneumatic, and petroleum-fluid connections where consistent static or dynamic sealing is required.

This O-ring is suited for residential and commercial plumbing, HVAC refrigerant and oil circuits, hydraulic assemblies, and general industrial fluid systems that use petroleum-based media. Its Buna-N compound delivers excellent resistance to petroleum products, fuels, and oils, making it a standard choice for pump seals, valve stems, pipe unions, and fitting connections. The part is sold in a package quantity of 50 units, supporting shop-stock replenishment and service fleet inventory. Minimum order quantity is 1 package.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound — excellent resistance to petroleum products, hydraulic oils, and fuels
• Round cross section with 0.0937-inch thickness for consistent gland fill and seal integrity
• 70 Shore A hardness provides strong compression set and tear and abrasion resistance
• Operating temperature range: -40 degrees F to 250 degrees F
• Meets SAE and MIL-Spec standards
• Package of 50 units supports shop stock and multi-unit service work

Compatibility

Compatible with petroleum products and petroleum-based hydraulic fluids. Designed for use in standard AS568 Dash 144 O-ring gland dimensions. Do not use with ozone-generating equipment, direct sunlight exposure environments, or media incompatible with Nitrile rubber. This part is not FDA approved and is not intended for food-contact applications.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or hydraulic system mechanics. Shut off and depressurize the system fully before removing the old O-ring and inspecting the gland for wear or damage. Lubricate the O-ring with a compatible fluid or assembly lubricant before seating to prevent pinching or tearing during installation. Do not store unused O-rings near motors, electrical equipment, or in direct sunlight, as ozone and UV exposure degrade Nitrile rubber over time.