Value Collection ZMSCH70254 O-ring Dash 254 Buna-n 10-pack

Product Description

The VALUE COLLECTION ZMSCH70254 is a Dash 254 Buna-N (Nitrile Butadiene Rubber) O-ring with a 5.5-inch inside diameter, 5.75-inch outside diameter, and a 0.125-inch round cross section. Rated at 70 Shore A hardness, this O-ring is built for sealing applications involving petroleum-based fluids, hydraulic oils, and fuels. The nitrile compound provides strong resistance to compression set, tearing, and abrasion, making it a reliable choice for static and dynamic sealing. It operates across a temperature range of -40 degrees F to 250 degrees F. Sold in a package of 10. Licensed HVAC technicians, plumbers, and fluid-system mechanics are the primary installers.

This O-ring is suited for use in hydraulic systems, pneumatic assemblies, pumps, valves, fittings, and fluid-transfer components where petroleum product compatibility is required. The Dash 254 designation follows standard AS568 sizing, making it a direct dimensional match for any system calling out that dash number. Applications span residential and commercial maintenance, industrial fluid systems, and general mechanical sealing work where a mid-large diameter seal is needed.

Key Features

• Buna-N (Nitrile) compound offers excellent resistance to petroleum products, hydraulic oils, and fuels
• 70 Shore A hardness rating provides a firm, reliable seal with good compression recovery
• Operates from -40 degrees F to 250 degrees F for broad service range
• Round cross section conforms to AS568 Dash 254 standard sizing
• Meets SAE and MIL-Spec standards
• Sold in a package of 10 units; minimum order quantity of 1 package

Compatibility

Compatible with petroleum products and petroleum-based fluids. Designed to fit any application specifying an AS568 Dash 254 O-ring with a 5.5-inch inside diameter and 0.125-inch cross section. Not FDA approved; not intended for food-contact or potable-water applications.

Installation Notes

Installation is performed by qualified plumbers, hydraulic technicians, or mechanical maintenance personnel. Depressurize and drain the system completely before replacing any O-ring. Lightly lubricate the O-ring with a compatible fluid or grease before seating to prevent rolling and damage during assembly. Do not store unused O-rings in direct sunlight or near motors and electrical equipment that may generate ozone, as ozone exposure degrades nitrile rubber over time.