Value Collection ZMSCH70363 O-ring Dash 363 Nbr 70

Product Description

The VALUE COLLECTION ZMSCH70363 is a Dash 363 nitrile butadiene rubber (NBR) O-ring designed for static and dynamic sealing applications across HVAC, plumbing, hydraulic, and fluid-handling systems. It measures 6.5 inches inside diameter, 6.875 inches outside diameter, and 0.1875 inches thick with a round cross section. The compound is Buna-N, the most widely used O-ring elastomer, rated at 70 Shore A hardness. It delivers excellent resistance to petroleum-based fluids, good compression set performance, and strong tear and abrasion resistance. Licensed HVAC technicians, plumbers, and fluid-system mechanics commonly install this size for larger-bore fittings, flanges, and pump assemblies.

This O-ring suits residential and commercial installations wherever a Dash 363 seal is specified. Typical applications include pump housings, pipe flanges, valve bonnets, and refrigerant-side connections that handle petroleum products, oils, fuels, or hydraulic fluids. The Buna-N compound is compatible with petroleum products but should not be exposed to ozone-generating equipment, direct sunlight during storage, or ozone-rich environments. This package contains 5 O-rings. SAE and MIL-Spec standards apply.

Key Features

• Buna-N (NBR) compound — the most widely used O-ring elastomer for petroleum fluid compatibility
• 70 Shore A hardness rating provides firm, reliable sealing under compression
• Round cross section, Dash 363 standard sizing for drop-in replacement fits
• Operating temperature range: -40 degrees F to 250 degrees F
• Meets SAE and MIL-Spec standards
• Package quantity of 5 minimizes callbacks on repeat or nearby seal replacements

Compatibility

Designed as a standard Dash 363 O-ring replacement compatible with petroleum products and petroleum-based fluid systems. Compatible Material: Petroleum Products.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, or hydraulic system mechanics. Always relieve system pressure and shut off fluid supply before removing the old seal. Clean the groove thoroughly and inspect for wear or damage before seating the new O-ring. Do not store unused O-rings in direct sunlight or near motors and other electrical equipment that may generate ozone, as exposure degrades the NBR compound over time.