Value Collection ZMSCH70017 O-ring Dash 017 Buna-n 70D Pack 100

Product Description

The VALUE COLLECTION ZMSCH70017 is a Dash 017 Buna-N (Nitrile Butadiene Rubber) o-ring with a round cross section, sized at 0.688 inches inside diameter, 0.813 inches outside diameter, and 0.0625 inches thick. Rated at 70 Shore A hardness, it operates across a wide temperature range of -40 degrees F to 250 degrees F and delivers excellent resistance to petroleum-based fluids. These o-rings are widely used by HVAC technicians, plumbers, and refrigeration service professionals as face seals, port plugs, and inline static seals wherever a reliable, compression-resistant elastomer is required. Each package contains 100 units, making it practical for field kits and shop stock.

Buna-N is the most commonly specified o-ring elastomer in trade service work. This Dash 017 size suits low-pressure fittings, valve stems, and pipe connections found in residential and light commercial HVAC, plumbing, and fluid-handling equipment. Its compatibility with petroleum products makes it appropriate for oil-lubricated systems, fuel handling connections, and hydraulic service ports. This o-ring is not intended for applications involving ozone, strong oxidizing agents, or prolonged UV exposure, and should be stored away from direct sunlight and ozone-generating electrical equipment.

Key Features

• Buna-N (Nitrile Butadiene Rubber) material — most widely used o-ring elastomer in trade applications
• Dash 017 standard sizing: 0.688 inches ID, 0.813 inches OD, 0.0625 inches thick
• 70 Shore A hardness for a firm, reliable compression set in static sealing applications
• Operating temperature range: -40 degrees F to 250 degrees F
• Excellent resistance to petroleum products, oils, and hydraulic fluids
• Meets SAE and MIL-Spec standards; round cross section for consistent groove seating
• Sold in a 100-piece package, minimum order quantity of 1 package

Compatibility

Compatible with petroleum-based fluids and suitable for static sealing applications in HVAC, plumbing, refrigeration, and hydraulic equipment where a Dash 017 Buna-N o-ring is specified. Not compatible with ozone, strong oxidizers, or applications requiring FDA-approved elastomers.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or refrigeration mechanics. Always depressurize and isolate the system before replacing any o-ring in a fluid or refrigerant circuit. Lightly lubricate the o-ring with a compatible lubricant — confirm lubricant compatibility with Buna-N and the system fluid before use. Do not overstretch or roll the o-ring during installation, as this can compromise the seal.