Value Collection ZMSCH70148 O-ring Dash 148 Nbr Pack of 50

Product Description

The VALUE COLLECTION ZMSCH70148 is a Dash 148 Nitrile Butadiene Rubber (NBR) O-ring designed for use in fluid sealing applications across plumbing, hydraulic, pneumatic, and HVAC systems. It measures 2.75 inches inside diameter, 2.938 inches outside diameter, and 0.0937 inches (3/32 inches) thick, with a round cross section and a Shore A hardness of 70. Buna-N is the most widely used O-ring elastomer in the trade, valued for its excellent resistance to petroleum-based fluids, strong compression set retention, and good tear and abrasion resistance. Licensed plumbers, HVAC technicians, and industrial maintenance professionals rely on this compound for everyday sealing work.

This O-ring is suited for residential and commercial applications where contact with petroleum products, oils, fuels, and hydraulic fluids is expected. It performs across a broad service temperature range of -40 degrees F to 250 degrees F, making it appropriate for most standard mechanical and fluid systems. It is not intended for applications involving ozone exposure, strong oxidizing agents, or direct sunlight storage. This item is packaged in a quantity of 50, making it practical for service shops, fleet maintenance, and contractors who routinely replace seals during inspections or equipment rebuilds.

Key Features

• Buna-N (NBR) compound offers excellent resistance to petroleum-based fluids, oils, and fuels
• Dash 148 standard sizing: 2.75 inches ID, 2.938 inches OD, 0.0937 inches thick
• Round cross section for consistent seating in standard O-ring grooves
• Shore A hardness of 70 provides a hard, reliable seal under compression
• Wide service temperature range: -40 degrees F to 250 degrees F
• Meets SAE and MIL-Spec standards

Compatibility

Designed for use with petroleum products and compatible fluids in standard Dash 148 O-ring groove applications. This compound is suitable for hydraulic, pneumatic, fuel, and general-purpose fluid sealing systems where NBR elastomers are specified.

Installation Notes

O-ring replacement is performed by plumbers, HVAC technicians, and mechanical service professionals. Always depressurize and drain the system before removing the existing seal. Inspect the groove for damage, debris, or scoring prior to seating the new ring. Avoid rolling or twisting the O-ring during installation, and do not store unused rings near motors, electrical equipment, or direct sunlight, as ozone and UV exposure degrade NBR compounds over time.