Value Collection ZMSCS70902 Silicone O-ring Dash 902 50 Pack

Product Description

The VALUE COLLECTION ZMSCS70902 is a Dash 902 silicone O-ring designed for use as an O-ring boss gasket on straight-thread tube fittings. Measuring 0.239 inches inner diameter, 0.367 inches outer diameter, and 0.064 inches thick, this round cross-section seal is made from white silicone with a hardness rating of 70 Shore A. Silicone compound delivers a wide service temperature range of -80 degrees F to 450 degrees F, making it well suited for applications where standard nitrile or EPDM seals fall short. Sold in a package quantity of 50, this O-ring is installed by HVAC technicians, plumbers, and industrial mechanics working with threaded hydraulic and pneumatic fitting assemblies.

This O-ring is intended for O-ring boss (ORB) straight-thread port and tube fitting connections where a reliable face or port seal is required. Its silicone material provides good dry heat resistance and strong weather and ozone resistance, making it appropriate for outdoor-exposed systems and high-temperature lines. It carries limited oil resistance, so it is not the preferred choice for petroleum-fluid service lines. Typical applications include compressed air systems, water lines, HVAC refrigerant-adjacent fittings, and other systems demanding broad thermal tolerance.

Key Features

• Dash 902 O-ring boss gasket for straight-thread tube fittings
• Wide temperature range: -80 degrees F to 450 degrees F
• Round cross-section silicone construction with 70 Shore A hardness
• Good weather and ozone resistance for outdoor and exposed installations
• White silicone material — readily distinguishable from nitrile and EPDM seals during service
• Package quantity of 50 suits service van stocking and shop inventory

Compatibility

Designed as an O-ring boss gasket for straight-thread tube fittings using the Dash 902 size standard. Suited for applications requiring wide temperature range tolerance and good dry heat and ozone resistance; not recommended for petroleum-based fluid service where limited oil resistance is a concern.

Installation Notes

Power down or depressurize the system before replacing any O-ring fitting seal. Ensure the seating surface is clean and free of debris or damaged threads before installing the new O-ring. Lubricate the O-ring with a compatible fluid or assembly grease prior to installation to prevent tearing during make-up. Note that this silicone compound has limited oil resistance — verify fluid compatibility before installation in petroleum or hydraulic oil service.