Value Collection ZMSCH90155 O-ring Dash 155 Nbr Pack 25

Product Description

The VALUE COLLECTION ZMSCH90155 is a Dash 155 nitrile butadiene rubber (Buna-N) O-ring designed for static and dynamic sealing applications across plumbing, hydraulic, pneumatic, and fluid-handling systems. It measures 4 inches inside diameter, 4.188 inches outside diameter, and 0.103 inches thick with a round cross section. Durometer hardness is rated at 90 Shore A, placing it in the extra-hard category for applications requiring firm sealing under pressure. The material offers excellent resistance to petroleum-based fluids, making it a standard choice for fuel, oil, and hydraulic service. Each package contains 25 pieces.

This O-ring is suited for use in residential and commercial systems where petroleum-based media contact is expected, including hydraulic cylinders, fuel lines, pumps, valves, and fittings. Its Buna-N compound performs across a wide temperature range, from -40 degrees F to 250 degrees F, supporting installations in both cold-environment and moderate-heat applications. Plumbers, hydraulic technicians, and equipment service professionals are the typical installers. The Dash 155 sizing is a recognized standard designation used across OEM and aftermarket service scenarios.

Key Features

• Buna-N (nitrile butadiene rubber) compound with excellent resistance to petroleum products, oils, and fuels
• 90 Shore A durometer hardness — extra-hard rating for firm, reliable sealing under load
• Wide service temperature range: -40 degrees F to 250 degrees F
• Round cross section; 4 inches ID, 4.188 inches OD, 0.103 inches thick
• Meets SAE and MIL-Spec standards
• Good tear and abrasion resistance with excellent compression set characteristics
• Sold in a package quantity of 25 pieces

Compatibility

Designed as an OEM-style replacement or service O-ring for hydraulic, pneumatic, plumbing, and fluid-handling equipment that specifies a Dash 155 Buna-N seal. Compatible with petroleum-based products and media. Not FDA approved; not intended for food-contact applications.

Installation Notes

Installation is typically performed by licensed plumbers, hydraulic technicians, or equipment service professionals. De-pressurize and lock out the system before removing any seals or fittings. Inspect the gland or groove for damage, debris, or out-of-tolerance dimensions before seating the new O-ring. Avoid storing unused O-rings in direct sunlight or near motors and other electrical equipment that may generate ozone, as this degrades nitrile rubber over time.