Value Collection ZMSCH90109 O-ring Dash 109 Nbr 90 Duro

Product Description

The VALUE COLLECTION ZMSCH90109 is a Dash 109 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in fluid sealing applications. It measures 0.313 inches inside diameter, 0.5 inches outside diameter, and 0.094 inches thick, with a round cross-section. Rated at 90 durometer (extra hard), it delivers excellent compression set resistance along with strong tear and abrasion resistance. The operating temperature range spans -40 degrees F to 250 degrees F, making it suitable for demanding service environments. Licensed plumbers, HVAC technicians, and fluid system mechanics install this type of seal in hydraulic, pneumatic, and refrigeration fittings.

This O-ring is suited for use in residential and commercial plumbing, HVAC refrigerant circuits, hydraulic lines, and pneumatic assemblies where petroleum-based fluid compatibility is required. Buna-N material provides excellent resistance to petroleum products, mineral oils, fuels, and many hydraulic fluids. It is not recommended for exposure to ozone, direct sunlight during storage, or environments near motors and other electrical equipment that may generate ozone. It meets SAE and MIL-Spec standards and ships in a package quantity of 100 units.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction offers excellent resistance to petroleum products and hydraulic fluids
• 90 durometer extra-hard rating provides strong compression set and abrasion resistance
• Operating range of -40 degrees F to 250 degrees F suits a wide range of service conditions
• Round cross-section, Dash 109 sizing for standard fitting applications
• Meets SAE and MIL-Spec standards
• Package quantity of 100 units supports stocking for repeat service calls

Compatibility

Designed for use with petroleum products and compatible fluids in standard Dash 109 O-ring groove applications across plumbing, HVAC, hydraulic, and pneumatic systems. Not FDA approved; not intended for food-contact or potable-water applications without independent verification of suitability.

Installation Notes

Power down or depressurize the system fully before replacing any O-ring seal. Licensed plumbers and HVAC technicians should follow applicable IPC and ASHRAE service procedures when working in pressurized fluid or refrigerant circuits. Lubricate the O-ring with a compatible lubricant before installation to ease seating and reduce risk of tearing. Do not store unused O-rings in direct sunlight or near motors or electrical equipment that may generate ozone, as ozone exposure degrades Buna-N material.