Value Collection ZMSCH70336 O-ring Dash 336 Nbr 25 Pack

Product Description

The VALUE COLLECTION ZMSCH70336 is a Dash 336 Buna-N (Nitrile Butadiene Rubber) O-ring with a 2.875-inch inside diameter, 3.25-inch outside diameter, and a 0.1875-inch cross-section thickness. This round-section elastomer seal is rated for a working temperature range of -40 degrees F to 250 degrees F and carries a hardness rating of 70 Shore A. It is sold in a package quantity of 25 rings. HVAC technicians, plumbers, and industrial maintenance professionals install this O-ring as a static or dynamic face seal in fluid and gas systems where petroleum-based media are present.

This O-ring is suited for residential and commercial applications involving hydraulic systems, refrigeration service ports, compressor fittings, fuel systems, and general plumbing connections where petroleum-product compatibility is required. Its Buna-N compound makes it the most widely used elastomer in fluid-sealing applications. The 25-piece packaging is appropriate for technicians servicing multiple units or stocking a service van.

Key Features

• Buna-N (NBR) compound offers excellent resistance to petroleum products including oils, fuels, and hydraulic fluids
• Wide temperature range: -40 degrees F to 250 degrees F
• 70 Shore A hardness with a hard hardness rating for reliable compression set performance
• Round cross-section profile for consistent seating in standard O-ring grooves
• Meets SAE and MIL-Spec standards
• Sold in a 25-piece package with a minimum order quantity of 1

Compatibility

Designed for use with petroleum products and compatible fluids. Suitable for standard Dash 336 O-ring groove applications in hydraulic, pneumatic, fuel, and refrigeration systems requiring a Buna-N seal. Not FDA approved; not intended for food-contact applications.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or industrial mechanics following applicable codes such as the IPC or IFGC where gas or fluid systems are involved. Always depressurize and drain the system before removing the old O-ring and inspect the groove for nicks or corrosion before seating the new ring. Avoid stretching the O-ring excessively during installation, and do not store unused rings in direct sunlight or near motors and electrical equipment that may generate ozone.