Value Collection ZMSCH70324 O-ring Dash 324 Nitrile 70A

Product Description

The VALUE COLLECTION ZMSCH70324 is a Dash 324 Buna-N (nitrile butadiene rubber) O-ring with a round cross section, designed for static and dynamic sealing applications across fluid and pneumatic systems. It measures 1.375 inches inside diameter, 1.75 inches outside diameter, and 0.1875 inches (3/16 inches) thick. With a Shore A hardness rating of 70, this O-ring delivers firm compression set resistance along with excellent tear and abrasion resistance. It is compatible with petroleum-based fluids, making it the most widely used general-purpose elastomer in industrial and mechanical sealing work. Licensed HVAC technicians, plumbers, and mechanical contractors routinely specify this size for valve, fitting, and pump seal applications.

This O-ring is suited for sealing duties in residential and commercial mechanical systems where petroleum-based lubricants, hydraulic oils, fuels, or similar media are present. It performs reliably across a temperature range of -40 degrees F to 250 degrees F, covering most heating, cooling, plumbing, and fluid-power service conditions. The round cross-section profile seats cleanly in standard AN/SAE Dash 324 O-ring grooves. Sold in a package quantity of 50 units, it is a practical bench-stock item for service shops and field technicians.

Key Features

• Buna-N (nitrile butadiene rubber) construction — the most widely used O-ring elastomer for petroleum service
• Shore A 70 durometer hardness — rated Hard, providing strong compression set and extrusion resistance
• Operating temperature range: -40 degrees F to 250 degrees F
• Excellent resistance to petroleum products, hydraulic oils, and fuels
• Round cross-section profile for consistent seating in standard Dash 324 grooves
• Meets SAE and MIL-Spec standards
• Package quantity of 50 — suitable for shop stock or multi-unit service jobs

Compatibility

Designed for use in any application calling for a standard Dash 324 O-ring groove; compatible with petroleum products and petroleum-based fluids. Not recommended for ozone-generating environments or direct sunlight storage. Not FDA approved.

Installation Notes

O-ring installation is performed by licensed plumbers, HVAC technicians, or industrial mechanics depending on the system type. Always depressurize and drain the affected line or component before removing the old O-ring. Lightly lubricate the O-ring with a compatible petroleum-based grease before seating to prevent pinching or rolling during assembly. Do not store unused O-rings near motors, electrical equipment, or in direct sunlight, as ozone and UV exposure degrade nitrile rubber over time.