Value Collection ZMSCH70FDA211 O-ring Dash 211 Buna-n 25 Pack

Product Description

The VALUE COLLECTION ZMSCH70FDA211 is a Dash 211 O-ring manufactured from Buna-N (Nitrile Butadiene Rubber), one of the most widely used elastomers in sealing applications across plumbing, HVAC, and fluid-handling systems. It measures 0.7960 inches inside diameter, 1.0620 inches outside diameter, and 0.1250 inches thick with a round cross section. Rated for a hardness of 70 Shore A, this O-ring carries FDA approval and meets SAE and MIL-Spec standards, making it suitable for both standard mechanical sealing and food-grade or petroleum-fluid contact applications. Each package contains 25 rings.

This O-ring is used wherever a reliable, petroleum-resistant seal is required in residential and light commercial systems. Common applications include pump seals, valve stems, pipe fittings, compression fittings, and hydraulic or pneumatic connections exposed to petroleum-based fluids, oils, and fuels. The Buna-N compound delivers excellent compression set resistance and strong tear and abrasion resistance, making it well suited for static and dynamic sealing in HVAC equipment, plumbing assemblies, and fluid-power components. The FDA-approved white Buna-N compound also extends its use to applications requiring incidental food contact compliance.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction with excellent resistance to petroleum products, oils, and fuels
• FDA approved white compound suitable for food-grade and standard sealing applications
• Meets SAE and MIL-Spec standards for dimensional and material conformance
• Round cross section with 70 Shore A hardness rating for reliable compression sealing
• Operating temperature range of -40 degrees F to 250 degrees F
• Packaged in quantities of 25 rings per pack

Compatibility

Compatible with petroleum products, oils, fuels, and hydraulic fluids. Designed as an OEM-style replacement or service-stock O-ring for Dash 211 applications in plumbing valves, HVAC refrigerant-circuit fittings, pump assemblies, and fluid-handling components requiring a Buna-N elastomer seal.

Installation Notes

O-rings of this type are installed by licensed plumbers, HVAC technicians, and pipefitters during valve service, pump rebuilds, and fitting assembly. Always depressurize and isolate the system before replacing any O-ring seal. Lightly lubricate the O-ring with a compatible petroleum-based or system-appropriate lubricant before seating to prevent twisting or tearing during installation. Do not store Buna-N O-rings in direct sunlight or near motors, generators, or other equipment that may produce ozone, as ozone exposure degrades nitrile compounds.