Value Collection ZMSCH70MD245 O-ring Dash 245 Nbr 70

Product Description

The VALUE COLLECTION ZMSCH70MD245 is a Dash 245 O-ring made from Nitrile Butadiene Rubber (NBR), the most widely used elastomer in fluid sealing applications. It measures 4.359 inches inside diameter, 4.625 inches outside diameter, and 0.125 inches thick with a round cross section. Rated at 70 Shore A hardness, this O-ring delivers excellent resistance to petroleum products along with strong compression set, tear, and abrasion resistance. It is used by plumbers, HVAC technicians, and industrial maintenance professionals wherever a reliable static or dynamic petroleum-compatible seal is required. Package includes 2 O-rings per unit.

This O-ring is suited for hydraulic systems, pneumatic assemblies, pumps, valves, and pipe fittings that come into contact with petroleum-based fluids, oils, and fuels. It performs across a wide temperature range, from -40 degrees F to 250 degrees F, making it appropriate for both indoor mechanical rooms and outdoor equipment exposed to seasonal temperature swings. Its black NBR construction is compatible with a broad range of petroleum products encountered in HVAC, plumbing, and general industrial service.

Key Features

• Nitrile Butadiene Rubber (NBR) construction with excellent petroleum product resistance
• 70 Shore A hardness rating for reliable sealing under compression
• Round cross section, Dash 245 standard sizing for drop-in replacement fitment
• Operating temperature range: -40 degrees F to 250 degrees F
• Strong tear and abrasion resistance extends service life in dynamic applications
• Store away from direct sunlight, ozone sources, and electrical motors to preserve elastomer integrity

Compatibility

Compatible with petroleum products including oils, fuels, and hydraulic fluids. Designed as a standard Dash 245 O-ring replacement for any application requiring a 4.359-inch ID, 4.625-inch OD, 0.125-inch thick round cross section seal. Note: not FDA approved for food-contact applications.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, or qualified maintenance personnel. Depressurize and isolate the system before removing the old O-ring. Inspect the sealing groove for burrs, corrosion, or debris, and clean thoroughly before seating the new ring. Do not use petroleum-based lubricants unless confirmed compatible with the system fluid; use an appropriate O-ring lubricant to ease installation and prevent rolling or twisting in the groove.