Value Collection ZMSCH70218 O-ring Dash 218 Buna-n Pack 100

Product Description

The Value Collection ZMSCH70218 is a Dash 218 O-ring designed for static and dynamic sealing applications across plumbing, hydraulic, and fluid-handling systems. Manufactured from Buna-N (nitrile butadiene rubber), this O-ring measures 1.25 inches inside diameter, 1.5 inches outside diameter, and 0.125 inches thick with a round cross section. The 70 Shore A hardness rating provides a balance of flexibility and compression resistance suited to high-use sealing environments. Each package contains 100 O-rings, making it practical for service shops and contractors who replace seals regularly. Licensed plumbers, HVAC technicians, and hydraulic system technicians are the primary installers.

This O-ring is rated for continuous service from -40 degrees F to 250 degrees F and is compatible with petroleum-based fluids, making it well suited for fuel systems, hydraulic lines, compressor fittings, and general plumbing connections. Buna-N is the most widely used O-ring elastomer in trade applications due to its resistance to oils, fuels, and common hydraulic fluids. The Dash 218 size is a standard AS568 dimension, commonly stocked in maintenance and service kits across residential and light commercial systems.

Key Features

• Buna-N (nitrile) material offers excellent resistance to petroleum products, oils, and hydraulic fluids
• Rated -40 degrees F to 250 degrees F for broad operating range
• 70 Shore A hardness provides strong compression set and tear and abrasion resistance
• Round cross section for consistent sealing in standard O-ring grooves
• Meets SAE and MIL-Spec standards
• Pack of 100 units suitable for shop stock or bulk service work

Compatibility

Compatible with petroleum products and petroleum-based hydraulic fluids. Buna-N O-rings should not be used with glycol-based brake fluids, ketones, esters, or strong acids. Not FDA approved for food or beverage contact applications.

Installation Notes

Shut off fluid supply and depressurize the system before replacing any O-ring. Lightly lubricate the O-ring with a compatible fluid or O-ring lubricant before seating to reduce installation stress and prevent rolling. Avoid storing Buna-N O-rings in direct sunlight or near motors and electrical equipment that generate ozone, as ozone exposure degrades nitrile rubber over time. Installation should follow applicable IPC or OEM service procedures for the system being serviced.