Value Collection ZMSCH90901 O-ring Dash 901 Nbr 100-pack

Product Description

The VALUE COLLECTION ZMSCH90901 is a Dash 901 nitrile butadiene rubber (Buna-N) O-ring sold in a package of 100 pieces. It measures 0.185 inches inside diameter, 0.297 inches outside diameter, and 0.056 inches thick with a round cross section. Rated at 90 durometer (extra hard), this O-ring is designed to seal against petroleum-based fluids and is a standard choice in HVAC, plumbing, and hydraulic applications where fuel oils, lubricants, or refrigerant-compatible oils are present. Licensed plumbers, HVAC technicians, and mechanical contractors reach for Buna-N O-rings as a widely stocked, reliable sealing solution across a broad range of service temperatures.

This O-ring performs across a working temperature range of -40 degrees F to 250 degrees F, making it suitable for both refrigeration and hot-fluid service scenarios. Typical installations include valve stems, pump housings, refrigerant service fittings, compression fittings, and hydraulic line connections in residential and light commercial mechanical systems. The package quantity of 100 pieces supports shop stock, fleet service vans, and high-volume repair operations where consistent sealing consumables are needed on hand.

Key Features

• Buna-N (nitrile butadiene rubber) construction delivers excellent resistance to petroleum products including fuel oils, hydraulic fluids, and lubricating oils
• 90 durometer extra-hard rating provides strong compression set resistance and durability under repeated cycling
• Operating range of -40 degrees F to 250 degrees F suits a wide range of HVAC, plumbing, and hydraulic service conditions
• Round cross section with precise 0.056-inch thickness ensures consistent sealing in standard Dash 901 groove profiles
• Conforms to SAE and MIL-Spec standards for broad application acceptance
• Packaged 100 per unit to support shop stock and field service inventory

Compatibility

Designed as a standard Dash 901 O-ring replacement compatible with systems and components that contact petroleum products; not recommended for use with ozone-generating environments, direct sunlight exposure during storage, or fluids outside its rated compatibility range. Not FDA approved.

Installation Notes

Installation of O-rings should be performed by a qualified HVAC technician, plumber, or millwright following the equipment manufacturer's service procedure. Always depressurize and isolate the system before disassembling any fitting or valve seat. Avoid rolling or twisting the O-ring during installation; use a compatible lubricant approved for Buna-N material and the system fluid type. Do not store Buna-N O-rings near motors, electrical equipment, or in direct sunlight, as ozone and UV exposure degrade nitrile rubber over time.