Value Collection ZMSCH70344 O-ring Dash 344 Nitrile Nbr 70

Product Description

The VALUE COLLECTION ZMSCH70344 is a Dash 344 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in industrial and trade sealing applications. It features a 3.875-inch inside diameter, a 4.25-inch outside diameter, and a 0.1875-inch round cross section with a 70-durometer hardness rating. This O-ring delivers excellent resistance to petroleum-based fluids, strong compression set performance, and good tear and abrasion resistance. It is installed by HVAC technicians, plumbers, and mechanical service professionals wherever a reliable static or dynamic petroleum-resistant seal is required.

This O-ring is suited for use in hydraulic systems, fuel handling equipment, plumbing assemblies, and HVAC applications where contact with petroleum products is expected. Its Buna-N compound performs across a wide service temperature range, making it a practical choice for both residential and light commercial mechanical systems. Sold in a package quantity of 25, it is well suited for shop stocking and service vehicle inventory. Note that this compound should not be stored in direct sunlight or near motors and electrical equipment that may generate ozone.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound offers excellent petroleum product resistance
• 70-durometer hardness rating with round cross section geometry
• Service temperature range from -40 degrees F to 250 degrees F
• Excellent compression set, tear resistance, and abrasion resistance
• Meets SAE and MIL-Spec standards
• Package quantity of 25 units per order

Compatibility

Designed as a standard Dash 344 O-ring replacement compatible with petroleum-based fluid systems including hydraulic, fuel, and general plumbing assemblies where Buna-N elastomer is the specified compound.

Installation Notes

Installation should be performed by a qualified technician familiar with sealing system service procedures. Always depressurize and shut down the system before replacing O-rings. Lubricate the O-ring with a compatible fluid or grease prior to installation to prevent nicking or tearing during seating. Avoid twisting the O-ring during installation, and inspect the groove and mating surfaces for damage before reassembly.