Value Collection ZMSCH70039 O-ring Dash 039 Nbr 70 Duro

Product Description

The VALUE COLLECTION ZMSCH70039 is a Dash 039 Nitrile Butadiene Rubber (NBR/Buna-N) O-ring used to create reliable fluid and pressure seals in a wide range of mechanical systems. It features a 2.75-inch inside diameter, 2.875-inch outside diameter, and a 0.0625-inch (1/16 inch) round cross-section thickness. Hardness is rated at 70 Shore A, which provides firm compression set resistance alongside strong tear and abrasion resistance. Licensed plumbers, HVAC technicians, and industrial maintenance mechanics install this O-ring to seal fluid connections in petroleum-based fluid systems, hydraulic assemblies, and general mechanical plumbing applications.

This O-ring is suited for residential and commercial applications where contact with petroleum-based fluids is expected. It performs across a temperature range of -40 degrees F to 250 degrees F, making it appropriate for both ambient and elevated-temperature service environments. It is commonly installed in pump housings, valve bodies, fitting connections, and similar assemblies where a standard AS568 Dash 039 cross-section is specified. This SKU is sold in a package quantity of 100, supporting bulk service or stocking needs.

Key Features

• Buna-N (NBR) elastomer offers excellent resistance to petroleum products including oils, fuels, and hydraulic fluids
• 70 Shore A durometer hardness provides firm sealing with strong compression set and abrasion resistance
• Operating temperature range of -40 degrees F to 250 degrees F suits a broad range of service conditions
• Round cross-section with 0.0625-inch thickness conforms to AS568 Dash 039 standard dimensions
• Meets SAE and MIL-Spec standards for dimensional and material consistency
• Sold in a pack of 100 for efficient stocking and multi-unit service jobs

Compatibility

Designed as a standard Dash 039 O-ring replacement compatible with petroleum products and assemblies specifying Buna-N elastomer. Compatible material designation includes petroleum-based fluids. Not FDA approved; not suitable for food-contact or potable-water applications without verification of local code compliance.

Installation Notes

Licensed plumbers, hydraulic technicians, and mechanical maintenance professionals typically install this O-ring as part of fluid system service or repair. De-energize equipment and relieve system pressure completely before disassembling any fitting, valve, or pump housing. Avoid exposing Buna-N O-rings to direct sunlight or ozone-generating equipment such as electric motors during storage, as ozone degrades NBR elastomer. Lubricate the O-ring with a compatible fluid prior to installation to prevent tearing during assembly.