Value Collection ZMSCH70369 O-ring Dash 369 Nitrile 70A 5-pack

Product Description

The VALUE COLLECTION ZMSCH70369 is a Dash 369 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in fluid-sealing applications. It measures 8 inches inside diameter, 8.375 inches outside diameter, and 0.1875 inches (3/16 inches) thick with a round cross section. Hardness is rated at 70 Shore A, placing it in the hard range for reliable compression set performance. Buna-N compound delivers excellent resistance to petroleum-based fluids along with strong tear and abrasion resistance, making this O-ring a dependable choice for hydraulic, pneumatic, and fluid-handling sealing tasks. Each order ships in a pack of 5 pieces.

This O-ring is suited for use in hydraulic cylinders, pump housings, valve bodies, and fluid fittings where petroleum-product exposure is present. Typical applications include industrial machinery, plumbing assemblies, HVAC equipment, and other mechanical systems requiring a large-diameter face seal or piston seal. The operating temperature range of -40 degrees F to 250 degrees F covers most ambient and moderate-heat service conditions. It is not intended for use with ozone-generating environments, strong oxidizers, or ketone-based fluids.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction — excellent petroleum product compatibility
• 70 Shore A hardness for reliable compression set and sealing force
• Round cross section at 0.1875 inches thick for standard O-ring groove fitment
• Wide temperature range: -40 degrees F to 250 degrees F
• Meets SAE and MIL-Spec standards
• Pack of 5 units per order with a minimum order quantity of 1

Compatibility

Designed as an OEM-style Dash 369 replacement O-ring for any application requiring an 8-inch ID, 8.375-inch OD, 3/16-inch cross section seal in systems compatible with Buna-N elastomer. Compatible with petroleum-based fluids and lubricants; not compatible with ozone, direct sunlight exposure during storage, or fluids that degrade nitrile compounds.

Installation Notes

Installation is typically performed by a licensed plumber, hydraulic technician, or HVAC mechanic depending on the host system. Always depressurize and de-energize the system fully before removing the old seal. Lightly lubricate the O-ring with a compatible petroleum-based grease before seating it to prevent rolling or tearing during assembly. Do not store unused O-rings in direct sunlight or near motors or other electrical equipment that may generate ozone, as ozone exposure degrades nitrile compounds over time.