Value Collection ZMSCH70MD026 O-ring Dash 026 Nbr 70 10 Pack

Product Description

The VALUE COLLECTION ZMSCH70MD026 is a Dash 026 nitrile butadiene rubber (NBR) O-ring with a round cross section, sold in a package of 10. It measures 1.239 inches inside diameter (ID), 1.375 inches outside diameter (OD), and 0.0625 inches thick. Rated at 70 Shore A hardness, this O-ring is engineered for sealing applications involving petroleum-based fluids and is one of the most widely used elastomer types in fluid and gas sealing. It delivers reliable compression set, tear resistance, and abrasion resistance across a broad temperature range of -40 degrees F to 250 degrees F. HVAC technicians, plumbers, and fluid system technicians routinely use NBR O-rings in valve bodies, fittings, and mechanical seal assemblies.

This O-ring is suited for residential and commercial applications where petroleum product exposure is expected, including hydraulic systems, refrigeration oil circuits, fuel handling assemblies, and general-purpose plumbing connections. The Dash 026 designation follows the AS568 standard sizing series, making it straightforward to specify and cross-reference across OEM and aftermarket seal kits. The 10-piece package quantity supports service calls requiring multiple seals or stocking for repeat maintenance work.

Key Features

• Dash 026 AS568 standard sizing: 1.239 inches ID, 1.375 inches OD, 0.0625 inches thick
• 70 Shore A hardness rating for firm, reliable sealing under compression
• NBR elastomer provides excellent resistance to petroleum products, hydraulic oils, and fuels
• Operating temperature range: -40 degrees F to 250 degrees F
• Round cross section for consistent seating in standard O-ring grooves
• Should not be stored in direct sunlight or near motors and electrical equipment that may generate ozone

Compatibility

Compatible with petroleum-based fluids and products. Designed as an OEM-style replacement O-ring for valves, fittings, and seal assemblies requiring an AS568 Dash 026 NBR O-ring with a 70 durometer rating.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or fluid system mechanics. Always depressurize and isolate the system before replacing any O-ring seal. Lightly lubricate the O-ring with a compatible fluid or grease before seating to prevent twisting and damage during assembly. Avoid overstretching the O-ring during installation, and verify groove dimensions are within the manufacturer-specified tolerance for the Dash 026 size before reassembly.