Value Collection ZMSCH70315 O-ring Dash 315 Buna-n 70A

Product Description

The VALUE COLLECTION ZMSCH70315 is a Dash 315 O-ring manufactured from Buna-N (Nitrile Butadiene Rubber), the most widely used elastomer in fluid-sealing applications. It measures 0.787 inches inside diameter, 1.188 inches outside diameter, and 0.1875 inches thick, with a round cross section and a Shore A hardness rating of 70. This O-ring is engineered for static and dynamic sealing in systems that contact petroleum-based fluids, making it a standard choice in hydraulic, pneumatic, plumbing, and HVAC refrigerant-oil-side connections. Each package contains 50 pieces with a minimum order quantity of one.

This O-ring is suited for use in residential and commercial plumbing fittings, hydraulic valve bodies, fuel system connections, and HVAC equipment service ports where petroleum-based lubricants and oils are present. It performs reliably across a wide temperature range, from -40 degrees F to 250 degrees F, covering most standard mechanical and HVAC service environments. Techs and plumbers frequently stock Buna-N O-rings in common dash sizes for field repairs on pumps, valves, fittings, and manifolds.

Key Features

• Buna-N (NBR) elastomer — excellent resistance to petroleum products, hydraulic fluids, and oils
• 70 Shore A hardness — balances flexibility and compression set resistance for most service conditions
• Operating range of -40 degrees F to 250 degrees F for broad application coverage
• Round cross section with consistent 0.1875-inch thickness for reliable groove seating
• Meets SAE and MIL-Spec standards
• Packaged in quantities of 50 — suitable for field stock and shop inventory

Compatibility

Designed as a standard Dash 315 replacement O-ring compatible with petroleum-based fluid systems including hydraulic circuits, fuel connections, and oil-side plumbing and HVAC fittings that accept a 0.787-inch ID round-cross-section O-ring. Not recommended for use with ozone, direct sunlight exposure, or systems generating electrical ozone near the seal. Not FDA approved.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or hydraulic service technicians. Always depressurize and isolate the system before removing or replacing O-rings. Lightly lubricate the O-ring with a compatible petroleum-based grease before seating to reduce the risk of tearing during assembly. Store unused O-rings away from direct sunlight, ozone sources, and electrical equipment to preserve elastomer integrity.