Value Collection ZMSCH70261 O-ring Dash 261 Nitrile 70

Product Description

The VALUE COLLECTION ZMSCH70261 is a Dash 261 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in fluid-sealing applications. It measures 6.75 inches inside diameter, 7 inches outside diameter, and 0.125 inches thick with a round cross-section profile. Hardness is rated at 70 Shore A, which falls in the hard range, providing excellent compression set resistance and strong tear and abrasion resistance. This O-ring is compatible with petroleum-based fluids and operates across a temperature range of -40 degrees F to 250 degrees F. It is installed by licensed plumbers, HVAC technicians, and maintenance mechanics in hydraulic, pneumatic, and fluid-handling assemblies.

This O-ring is suited for use in residential and commercial plumbing, HVAC refrigerant systems, hydraulic equipment, and industrial fluid-sealing applications where petroleum-product compatibility is required. The Dash 261 designation follows SAE and MIL-Spec standards, making it a standard cross-reference size across a wide range of OEM and aftermarket assemblies. Sold in packages of 10, it is appropriate for service stock or single-job use depending on application volume.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction with excellent resistance to petroleum products
• 70 Shore A hardness rating for firm compression set and abrasion resistance
• Temperature range: -40 degrees F to 250 degrees F
• Round cross-section profile; Dash 261 standard sizing
• Meets SAE and MIL-Spec standards
• Store away from direct sunlight, ozone sources, and electrical motors to preserve elastomer integrity

Compatibility

Compatible with petroleum-based products; meets SAE and MIL-Spec standards for Dash 261 O-ring sizing. Designed as an OEM-style replacement or service seal for hydraulic, pneumatic, and fluid-handling assemblies requiring a 6.75-inch ID round-cross-section O-ring.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, or qualified maintenance mechanics. Always depressurize and de-energize the system before removing or installing seals. Lubricate the O-ring with a fluid compatible with Buna-N and the system medium prior to seating to prevent tearing during assembly. Do not expose the installed O-ring to ozone-generating equipment or direct UV light, as this degrades Buna-N elastomers over time.