Value Collection ZMSCH2X4 O-ring 4in Id 8in Od 2in Nbr

Product Description

The VALUE COLLECTION ZMSCH2X4 is a Buna-N (Nitrile Butadiene Rubber) O-ring with a round cross section, designed for use in fluid sealing and static or dynamic sealing applications across plumbing, hydraulic, pneumatic, and mechanical systems. It measures 4 inches inside diameter, 8 inches outside diameter, and 2 inches thick. Rated at 70 Shore A hardness, this O-ring offers excellent resistance to petroleum-based fluids, strong compression set performance, and solid tear and abrasion resistance. It is installed by plumbers, pipefitters, hydraulic technicians, and mechanical maintenance professionals.

This O-ring is suited for use in applications involving petroleum products, oils, fuels, and hydraulic fluids in both residential and commercial or industrial settings. Its wide operating temperature range of -40 degrees F to 250 degrees F makes it appropriate for demanding environments. Buna-N is the most widely used O-ring elastomer in the trade, making this a common go-to for groove-seated seals in valves, pumps, fittings, and fluid-handling assemblies. The black color is standard for this material type.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction — the most widely used O-ring elastomer in trade applications
• Excellent resistance to petroleum products, oils, and hydraulic fluids
• Strong compression set, tear resistance, and abrasion resistance
• Wide temperature range: -40 degrees F to 250 degrees F
• Round cross section with 70 Shore A hardness rating
• Meets SAE and MIL-Spec standards

Compatibility

Compatible with systems and assemblies using petroleum-based fluids, hydraulic oils, and fuels. Not recommended for exposure to ozone, direct sunlight, or environments near motors or electrical equipment that may generate ozone. Not FDA approved — not intended for food-contact applications.

Installation Notes

O-rings of this size are typically installed by licensed plumbers, pipefitters, or hydraulic system technicians. Always depressurize and de-energize the system before removing or installing sealing components. Inspect the groove for damage, burrs, or debris before seating the O-ring. Avoid twisting the O-ring during installation and use a compatible lubricant to prevent damage during assembly.