Value Collection ZMSCH70265 O-ring Dash 265 Nbr

Product Description

The VALUE COLLECTION ZMSCH70265 is a Dash 265 Nitrile Butadiene Rubber (NBR) O-ring designed for static and dynamic sealing applications across plumbing, HVAC, and industrial fluid systems. It measures 7.75 inches inside diameter, 8 inches outside diameter, and 0.125 inches thick with a round cross section. The Buna-N compound delivers reliable resistance to petroleum-based fluids and excellent compression set recovery, making it a go-to elastomer choice for licensed plumbers, HVAC technicians, and mechanical contractors working with oil-carrying lines, pump assemblies, and valve bodies.

This O-ring suits residential and commercial applications where petroleum product exposure is a constant factor. Typical installations include pump flanges, hydraulic fittings, compressor housings, and large-diameter valve seats. The 70-durometer hardness provides a firm, stable seal under moderate compression loading. Rated for operating temperatures from -40 degrees F to 250 degrees F, it handles the thermal cycling found in HVAC refrigerant-adjacent assemblies and fluid transfer systems. Sold in a package quantity of 5.

Key Features

• Buna-N (NBR) elastomer — the most widely used O-ring material for petroleum product resistance
• 70 Shore A hardness rating provides firm sealing with good tear and abrasion resistance
• Wide temperature range: -40 degrees F to 250 degrees F for demanding thermal environments
• Round cross section, Dash 265 standard sizing for predictable groove fit
• Meets SAE and MIL-Spec standards
• Should not be stored in direct sunlight or near motors and electrical equipment that may generate ozone

Compatibility

Compatible with petroleum products and petroleum-based fluids. Designed as a standard Dash 265 replacement O-ring for any application requiring a 7.75-inch ID Buna-N seal conforming to SAE and MIL-Spec O-ring standards.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, or mechanical contractors following applicable IPC and IFGC guidelines for fluid system maintenance. Always depressurize and de-energize the system before removing the old O-ring and inspect the groove for damage or debris prior to seating the new ring. Lubricate the O-ring with a compatible fluid or assembly lubricant before installation to prevent rolling or tearing. Do not stretch the O-ring over sharp edges or hardware threads without proper protection.