Value Collection ZMSCH70025 Nbr O-ring Dash 025 70 Duro

Product Description

The VALUE COLLECTION ZMSCH70025 is a Dash 025 Buna-N (Nitrile Butadiene Rubber) O-ring with a round cross section, designed for use in fluid and pneumatic sealing applications across HVAC, plumbing, and general mechanical systems. It measures 1.188 inches inside diameter, 1.313 inches outside diameter, and 0.0625 inches thick. With a Shore A hardness of 70 and a rated operating range of -40 degrees F to 250 degrees F, this O-ring delivers reliable sealing performance in petroleum-based media environments. Licensed HVAC technicians, plumbers, and mechanical contractors install this type of seal during equipment service and component replacement.

This O-ring is suited for residential and commercial applications where petroleum-compatible elastomer seals are required. Common install scenarios include valve seats, pump fittings, refrigerant service ports, and hydraulic or pneumatic line connections. The Buna-N compound is the most widely used O-ring elastomer in trade service work, offering excellent compression set characteristics along with solid tear and abrasion resistance. It ships in packages of 100 units with a minimum order quantity of 1.

Key Features

• Buna-N (NBR) compound with excellent resistance to petroleum products and hydraulic fluids
• 70 Shore A hardness rating for reliable sealing under compression
• Operating temperature range of -40 degrees F to 250 degrees F
• Round cross section with 0.0625-inch thickness for standard groove fitment
• Meets SAE and MIL-Spec standards
• Package quantity of 100 units suitable for stocking in service vehicles or shop inventory

Compatibility

Compatible with petroleum products and petroleum-based fluids. Designed as a standard Dash 025 O-ring replacement for use in any application specifying a 1.188-inch ID, 1.313-inch OD, 0.0625-inch thick Buna-N seal per SAE and MIL-Spec standards. Not FDA approved. Avoid exposure to direct sunlight, ozone sources, or electrical equipment generating ozone during storage.

Installation Notes

Installation is performed by licensed HVAC technicians, plumbers, or qualified mechanical contractors. Always depressurize and de-energize the system before replacing O-ring seals. Lubricate the O-ring with a compatible fluid during installation to prevent twisting or tearing during seating. Do not store unsealed O-rings near motors, compressors, or other ozone-generating equipment, as ozone degrades NBR compounds.