Value Collection ZMSCH70042 O-ring Dash 042 Nbr 70

Product Description

The VALUE COLLECTION ZMSCH70042 is a Dash 042 nitrile butadiene rubber (NBR) O-ring used to create leak-free seals in fluid and pneumatic systems. It measures 3.25 inches inside diameter, 3.375 inches outside diameter, and 0.0625 inches thick with a round cross section. The Buna-N elastomer compound delivers 70 Shore A hardness, strong compression set resistance, and reliable performance across a working temperature range of -40 degrees F to 250 degrees F. Licensed plumbers, HVAC technicians, and maintenance mechanics install this type of seal in hydraulic fittings, valves, pumps, and fluid-line connections where petroleum-based media are present.

This O-ring is suited for residential and commercial applications involving petroleum products, hydraulic fluids, and oils. Its SAE and MIL-Spec compliance makes it appropriate for both general trade service and maintenance work requiring standardized sealing components. The Dash 042 designation follows the AS568 standard sizing series, allowing straightforward cross-referencing when replacing worn or damaged seals in existing assemblies. Sold in a package quantity of 100 units, it is practical for shops stocking common seal sizes for routine service calls.

Key Features

• Buna-N (NBR) elastomer with excellent resistance to petroleum products, hydraulic fluids, and oils
• 70 Shore A hardness rating for reliable compression set performance
• Wide service temperature range: -40 degrees F to 250 degrees F
• Round cross section, 0.0625 inches thick, Dash 042 standard sizing
• Tear and abrasion resistant construction
• Meets SAE and MIL-Spec standards

Compatibility

Compatible with petroleum products and petroleum-based hydraulic fluids. Designed as a standard Dash 042 replacement O-ring for use in valves, pumps, fittings, and fluid-line assemblies where Buna-N elastomer is the specified material. Not recommended for exposure to ozone, direct sunlight during storage, or environments near motors or electrical equipment that generate ozone.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, or qualified maintenance mechanics. Shut off and depressurize the system completely before removing or installing any sealing components. Lubricate the O-ring with a compatible fluid or lubricant prior to installation to prevent pinching or tearing during assembly. Avoid storing unused O-rings in direct sunlight or near ozone-generating equipment such as motors or electrical devices.