Value Collection ZMSCH90245 O-ring Dash 245 Buna-n 90 Duro

Product Description

The VALUE COLLECTION ZMSCH90245 is a Dash 245 O-ring manufactured from Buna-N (nitrile butadiene rubber), one of the most widely used elastomers in fluid sealing applications. It measures 4.375 inches inside diameter, 4.625 inches outside diameter, and 0.125 inches thick, with a round cross section and an extra-hard 90 durometer rating. The part is rated for service from -40 to 250 degrees F and is compatible with petroleum-based fluids. Plumbers, hydraulic system technicians, and industrial maintenance professionals install this type of seal wherever positive fluid containment is required in petroleum-fluid circuits.

This O-ring is suited for static and dynamic sealing applications in hydraulic cylinders, pneumatic fittings, pump housings, and fluid-handling equipment that contacts petroleum-based oils and fuels. The high 90 durometer hardness makes it appropriate for high-pressure installations where a softer compound would extrude under load. It is sold in a package quantity of 25 pieces, making it practical for service shops or facilities that replace O-rings on a recurring maintenance schedule. The part conforms to SAE and MIL-Spec standards and is black in color. It is not FDA approved and should not be used in food-contact or potable-water applications.

Key Features

• Buna-N (nitrile butadiene rubber) construction offers excellent resistance to petroleum products, oils, and fuels
• Extra-hard 90 durometer rating reduces extrusion risk in high-pressure service
• Operating temperature range of -40 to 250 degrees F covers a wide range of industrial and HVAC applications
• Round cross section, Dash 245, with 4.375 inches ID and 4.625 inches OD for precise dimensional fit
• Meets SAE and MIL-Spec standards
• Package quantity of 25 pieces supports bulk service and stocking needs

Compatibility

Compatible with petroleum products including hydraulic oils and fuels. Not recommended for use with ozone, sunlight exposure, or equipment that generates ozone such as motors or electrical equipment. Not FDA approved; not suitable for food-grade or potable-water applications.

Installation Notes

Shut down and depressurize the system completely before removing or installing any O-ring seal. Inspect the gland and mating surfaces for scoring or contamination before installing the new seal. Lubricate the O-ring with a compatible fluid prior to installation to reduce the risk of tearing during assembly. This type of sealing work is typically performed by licensed plumbers, hydraulic technicians, or industrial maintenance mechanics following applicable system pressure and safety codes.