Value Collection ZMSCH2.5X19 O-ring 19mm Nitrile

Product Description

The VALUE COLLECTION ZMSCH2.5X19 is a black nitrile butadiene rubber (Buna-N) O-ring with a round cross section, designed for sealing applications across HVAC, plumbing, and fluid handling systems. It measures 19mm inside diameter, 24mm outside diameter, and 2.5mm thick. The Buna-N compound delivers excellent resistance to petroleum-based fluids and earns its place as the most widely used O-ring elastomer in trade applications. A hardness rating of 70 Shore A provides reliable compression set and strong tear and abrasion resistance, making it a dependable choice for high-cycle or high-contact installations.

This O-ring suits general sealing use wherever petroleum-compatible elastomers are required. Common applications include hydraulic fittings, refrigerant circuit fittings, fluid connectors, pump housings, and valve stems in residential and light commercial equipment. It is installed by HVAC technicians, plumbers, and pipefitters during service or new assembly work. This part meets SAE and MIL-Spec standards. It is not FDA approved and is not intended for food-contact or sanitary applications.

Key Features

• Buna-N (nitrile butadiene rubber) compound with excellent resistance to petroleum products
• 70 Shore A hardness for strong compression set and durability under load
• Round cross section ensures consistent seating in standard O-ring grooves
• Operating temperature range: -40 degrees F to 250 degrees F
• Meets SAE and MIL-Spec standards
• Store away from direct sunlight, ozone sources, and motors that generate electrical discharge

Compatibility

Compatible with petroleum-based fluids and products. Designed for use in standard O-ring groove applications requiring a 19mm ID, 24mm OD, 2.5mm thick nitrile seal. Not compatible with ozone-heavy environments or non-petroleum fluid systems where a different elastomer compound is required.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or pipefitters. Always depressurize and isolate the system before replacing any O-ring. Lubricate the O-ring with a compatible fluid or assembly lubricant prior to seating to prevent tearing during installation. Do not stretch or pinch the O-ring during placement, and inspect the groove for burrs or debris before seating.