Value Collection ZMSCH70224 O-ring Dash 224 Nbr 50-pack

Product Description

The VALUE COLLECTION ZMSCH70224 is a Dash 224 Nitrile Butadiene Rubber (NBR) O-ring designed for static and dynamic sealing applications across plumbing, hydraulic, pneumatic, and general industrial systems. It measures 1.75 inches inside diameter, 2.0 inches outside diameter, and 0.125 inches thick, with a round cross-section profile and a Shore A hardness of 70. The black Buna-N elastomer provides excellent resistance to petroleum-based fluids, making it a go-to seal for fuel systems, oil circuits, and hydraulic lines. Licensed plumbers, HVAC technicians, and mechanical contractors install this O-ring as a replacement or maintenance seal in fittings, valves, pumps, and connectors.

This O-ring is suited for residential and commercial applications wherever a Dash 224 seal is specified. Typical installations include hydraulic manifolds, refrigeration service valves, fuel system fittings, and water supply connectors. The working temperature range spans -40 degrees F to 250 degrees F, supporting use across a wide range of fluid temperatures encountered in HVAC, plumbing, and light industrial service. It meets SAE and MIL-Spec standards and is sold in a package quantity of 50, making it appropriate for shop stock and field service kits.

Key Features

• Buna-N (NBR) elastomer with excellent resistance to petroleum products, oils, and fuels
• Round cross-section profile conforms to Dash 224 standard sizing: 1.75 inches ID, 2.0 inches OD, 0.125 inches thick
• Shore A hardness of 70 rated as hard, providing reliable compression set performance
• Operating temperature range of -40 degrees F to 250 degrees F for broad service compatibility
• Meets SAE and MIL-Spec standards
• Sold in a 50-piece package, suitable for bulk shop stock or multi-unit service calls

Compatibility

Designed as a standard Dash 224 O-ring replacement compatible with petroleum-based fluids and systems specifying Buna-N elastomer seals. Not recommended for use with ozone, strong oxidizers, or applications requiring FDA-compliant materials.

Installation Notes

Licensed plumbers, HVAC technicians, and hydraulic service technicians install this O-ring. Always depressurize and isolate the system before removing any fittings or valves. Lightly lubricate the O-ring with a compatible fluid or O-ring lubricant before seating to prevent pinching or tearing during assembly. Do not store Buna-N O-rings in direct sunlight or near motors, compressors, or other electrical equipment that may generate ozone, as ozone exposure degrades NBR elastomers.