Value Collection ZMSCH70268 O-ring Dash 268 Buna-n Pack of 5

Product Description

The VALUE COLLECTION ZMSCH70268 is a Dash 268 O-ring made from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in fluid sealing applications. It measures 8.5 inches inside diameter, 8.75 inches outside diameter, and 0.125 inches thick with a round cross section. Rated for a hardness of 70 Shore A, this O-ring delivers excellent resistance to petroleum-based fluids, compression set, and tear and abrasion forces. It operates reliably across a temperature range of -40 degrees F to 250 degrees F. Licensed HVAC technicians, plumbers, and industrial maintenance professionals install this type of seal in pumps, valves, pipe flanges, and fluid handling equipment.

This O-ring is suited for use in residential and commercial plumbing, HVAC refrigerant and oil circuits, hydraulic systems, and any application involving petroleum-based fluids or lubricants. Its Buna-N compound is compatible with a broad range of petroleum products, making it a dependable choice for replacement seals in pumps, compressors, and fluid conveyance assemblies. Each order contains a pack of 5 O-rings. It is not FDA approved and should not be used in food-contact or potable water applications where NSF compliance is required. Avoid storing near direct sunlight, motors, or equipment that generates ozone.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound with excellent petroleum product resistance
• 70 Shore A hardness rating for a firm, reliable seal under compression
• Operating temperature range of -40 degrees F to 250 degrees F
• Round cross section, 0.125 inches thick, Dash 268 standard sizing
• Meets SAE and MIL-Spec standards
• Pack of 5 O-rings per order

Compatibility

Compatible with petroleum products and petroleum-based lubricants. Designed as a standard Dash 268 replacement O-ring for pumps, valves, compressors, pipe flanges, and hydraulic assemblies requiring an 8.5-inch inside diameter seal in Buna-N material.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or industrial mechanics during equipment service or rebuild. Always depressurize and isolate the system before removing old seals, and verify the mating groove dimensions match Dash 268 specifications before installation. Lightly lubricate the O-ring with a compatible fluid or grease to aid seating and prevent rolling during assembly. Do not expose to ozone-generating equipment or direct sunlight during storage, as this degrades Buna-N material over time.