Value Collection ZMSCH70219 O-ring Dash 219 Nitrile

Product Description

The VALUE COLLECTION ZMSCH70219 is a Dash 219 Buna-N (Nitrile Butadiene Rubber) O-ring with a round cross section, sized at 1.313 inches inside diameter, 1.563 inches outside diameter, and 0.125 inches thick. Rated at 70 Shore A hardness, this O-ring handles a working temperature range of -40 degrees F to 250 degrees F and is compatible with petroleum-based fluids, making it one of the most widely specified elastomers in fluid-sealing applications. Plumbers, HVAC technicians, and industrial maintenance professionals install this part in hydraulic, pneumatic, and fluid-transfer assemblies where reliable static or dynamic sealing is required.

This O-ring is suited for residential and commercial applications involving petroleum-product contact, including hydraulic fittings, plumbing connections, pump seals, and refrigeration or HVAC line fittings. Its Buna-N compound provides strong resistance to oils, fuels, and greases, making it a standard choice when specifying replacements for seals in fluid-handling equipment. The part is sold in packages of 50 with a minimum order quantity of 1, making it practical for both single-repair and stocking purposes.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound — the most widely used O-ring elastomer for petroleum-fluid environments
• 70 Shore A hardness rating provides a firm seal with good compression set resistance
• Operating range of -40 degrees F to 250 degrees F suits most HVAC, plumbing, and hydraulic service conditions
• Round cross section conforms to SAE and MIL-Spec standards
• Excellent tear and abrasion resistance for dynamic sealing applications
• Package quantity of 50 supports service-van stocking and bulk repair jobs

Compatibility

Compatible with petroleum products including oils, fuels, and greases. Conforms to SAE and MIL-Spec standards for Dash 219 O-rings. Not FDA approved; not recommended for food-contact or ozone-heavy environments. Store away from direct sunlight, motors, and electrical equipment that may generate ozone.

Installation Notes

O-rings in this size range are typically installed by licensed plumbers, HVAC technicians, or hydraulic system mechanics. Before replacing any O-ring, depressurize the system completely and isolate the fluid supply. Lubricate the O-ring with a compatible fluid or assembly lubricant prior to seating to prevent tearing during installation. Do not stretch the O-ring beyond its design groove dimensions, and inspect the mating groove for nicks or burrs that could cause premature seal failure.