Value Collection ZMSCH70247 O-ring Dash 247 Nitrile Buna-n

Product Description

The VALUE COLLECTION ZMSCH70247 is a Dash 247 O-ring manufactured from Buna-N (nitrile butadiene rubber), the most widely used elastomer in sealing applications. It measures 4.625 inches inside diameter, 4.875 inches outside diameter, and 0.125 inches thick with a round cross section. Rated at 70 durometer hardness, this O-ring delivers reliable sealing performance across a broad temperature range of -40 degrees F to 250 degrees F. It offers excellent resistance to petroleum products along with strong compression set, tear resistance, and abrasion resistance. Plumbers, hydraulic technicians, and mechanical service professionals install this part wherever a standard Dash 247 O-ring seal is required.

This O-ring is suited for use in fluid power systems, hydraulic assemblies, pneumatic fittings, pump housings, and plumbing connections where petroleum-based fluid compatibility is essential. Its Buna-N compound makes it a go-to choice for fuel systems, oil circuits, and general-purpose sealing in both residential and light commercial mechanical applications. It is not recommended for exposure to ozone, direct sunlight during storage, or environments near motors and other electrical equipment that may generate ozone. The part ships in a package quantity of 25 and carries a minimum order quantity of 1.

Key Features

• Buna-N (nitrile butadiene rubber) compound with excellent petroleum product resistance
• 70 durometer hardness rating for a firm, reliable seal under compression
• Operating temperature range: -40 degrees F to 250 degrees F
• Round cross section per standard Dash 247 sizing
• Meets SAE and MIL-Spec standards
• Strong tear and abrasion resistance for demanding service environments

Compatibility

Designed as a standard Dash 247 O-ring replacement compatible with petroleum-based fluid systems including hydraulic, fuel, and oil circuit assemblies that accept a 4.625-inch ID round-cross-section seal.

Installation Notes

Installation is typically performed by licensed plumbers, hydraulic technicians, or qualified mechanical service personnel. Depressurize and drain the system fully before replacing any O-ring seal. Lightly lubricate the O-ring with a compatible fluid or assembly grease before seating to prevent twisting or pinching during installation. Do not store Buna-N O-rings in direct sunlight or near motors and electrical equipment that produce ozone, as this will degrade the elastomer.