Value Collection ZMSCH70121 O-ring Dash 121 Nbr Pack of 100

Product Description

The VALUE COLLECTION ZMSCH70121 is a Dash 121 O-ring made from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in fluid sealing applications. It features a round cross section with an inside diameter of 1.0625 inches, an outside diameter of 1.25 inches, and a thickness of 0.0937 inches. With a durometer hardness rating of 70 Shore A, this O-ring delivers firm compression set resistance and solid tear and abrasion performance. It is sold in a package quantity of 100 rings. Licensed plumbers, pipefitters, hydraulic technicians, and HVAC mechanics are the primary installers.

This O-ring is suited for use in hydraulic systems, pneumatic assemblies, plumbing connections, and HVAC equipment where petroleum-based fluids or lubricants are present. Its Buna-N compound provides excellent resistance to petroleum products, making it a practical choice for fuel lines, oil circuits, and general-purpose fluid connections in both residential and light commercial service environments. The operating temperature range of -40 degrees F to 250 degrees F covers most standard HVAC, plumbing, and hydraulic applications.

Key Features

• Buna-N (Nitrile Butadiene Rubber) material offers excellent resistance to petroleum products and oils
• Round cross section with 0.0937 inch thickness ensures consistent sealing under compression
• 70 Shore A hardness rating provides firm compression set and abrasion resistance
• Operating range from -40 degrees F to 250 degrees F suits most trade applications
• Meets SAE and MIL-Spec standards
• Sold in a 100-piece package with a minimum order quantity of 1

Compatibility

Designed as a standard Dash 121 replacement O-ring compatible with petroleum-based fluid systems. Compatible materials include petroleum products as specified by the manufacturer. Not suitable for use with ozone, sunlight exposure, or near motors and electrical equipment that generate ozone.

Installation Notes

Installation is typically performed by licensed plumbers, pipefitters, or HVAC technicians. Always depressurize and drain the system before replacing O-rings, and shut off all fluid supply valves upstream of the work area. Lubricate the O-ring with a compatible petroleum-based lubricant before seating to prevent tearing during installation. Do not store unused O-rings in direct sunlight or near motors or other electrical equipment that may generate ozone, as this will degrade the Buna-N compound.