Value Collection ZMSCH90260 O-ring Dash 260 Buna-n

Product Description

The VALUE COLLECTION ZMSCH90260 is a Dash 260 Buna-N (Nitrile Butadiene Rubber) O-ring with a 6.5-inch inside diameter, 6.75-inch outside diameter, and a 0.125-inch cross-section thickness. Rated at 90 durometer (Extra Hard), this O-ring is built for static and dynamic sealing applications where petroleum-based fluids and hydraulic media are present. The round cross-section profile seats consistently in standard AN/MS dash-260 grooves. Licensed plumbers, millwrights, and hydraulic system technicians regularly specify this elastomer for fluid-sealing service across a broad temperature range of -40 to 250 degrees F.

This O-ring is suited for use in hydraulic cylinders, pump housings, valve bodies, and fluid connectors where exposure to petroleum products, oils, fuels, and lubricants is expected. The Buna-N compound makes it one of the most widely used elastomers in industrial plumbing, HVAC refrigerant-oil circuits, and hydraulic equipment. It is sold in a package quantity of 10, making it practical for both service-call restocking and bench-level rebuild kits.

Key Features

• Dash 260 standard sizing: 6.5-inch ID x 6.75-inch OD x 0.125-inch thick
• 90 durometer Extra Hard rating for high-pressure sealing applications
• Buna-N (Nitrile Butadiene Rubber) compound offers excellent resistance to petroleum products, oils, and fuels
• Operating temperature range of -40 to 250 degrees F
• Excellent compression set, tear resistance, and abrasion resistance
• Meets SAE and MIL-Spec standards
• Package quantity of 10 per order

Compatibility

Compatible with petroleum products, hydraulic oils, fuels, and lubricants. Not recommended for use with ozone-generating environments or direct sunlight exposure. Designed as an OEM-style replacement or service O-ring for any application calling for a standard Dash 260 Buna-N O-ring.

Installation Notes

Installation should be performed by a qualified technician familiar with fluid system sealing practices. Always depressurize and drain the system before removing or replacing O-rings. Lightly lubricate the O-ring with a compatible fluid or assembly lubricant prior to seating to prevent rolling or pinching during installation. Do not store unused O-rings in direct sunlight or near motors and electrical equipment that may generate ozone, as this degrades the Buna-N compound.