Value Collection ZMSCH70MD334 O-ring Dash 334 Nbr Pack of 2

Product Description

The VALUE COLLECTION ZMSCH70MD334 is a Dash 334 Buna-N (Nitrile Butadiene Rubber) O-ring with a 2.625-inch inside diameter, 3.0-inch outside diameter, and a 3/16-inch (0.1875-inch) round cross section. Rated at 70 Shore A hardness, this O-ring carries a working temperature range of -40 degrees F to 250 degrees F and is compatible with petroleum-based fluids and lubricants. Buna-N is the most widely used O-ring elastomer in the trades, offering strong resistance to petroleum products along with reliable compression set, tear resistance, and abrasion resistance. Sold in a package of 2.

This O-ring is suited for hydraulic systems, pneumatic fittings, pumps, valves, and fluid-transfer connections where petroleum-based media is present. It is a common replacement seal in HVAC equipment, plumbing assemblies, and general industrial applications. Technicians should note that this compound should not be stored in direct sunlight or near motors and other electrical equipment that may generate ozone, as ozone exposure degrades nitrile rubber over time.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction — the most widely used O-ring elastomer for petroleum-service applications
• Dash 334 standard sizing: 2.625 inches ID x 3.0 inches OD x 0.1875 inches thick
• Round cross section for consistent sealing contact and reliable compression set
• Working temperature range: -40 degrees F to 250 degrees F
• 70 Shore A hardness (Hard rating) for durability under pressure
• Compatible with petroleum products; not FDA approved for food-contact applications

Compatibility

Designed as a standard Dash 334 O-ring replacement for any groove or fitting machined to Dash 334 dimensions, commonly found in hydraulic, pneumatic, plumbing, and HVAC assemblies that use petroleum-compatible seals.

Installation Notes

O-rings of this type are installed by plumbers, HVAC technicians, and mechanical trades. Always depressurize and de-energize the system before replacing any seal. Lightly lubricate the O-ring with a compatible petroleum-based or silicone grease before installation to prevent tearing during assembly. Inspect the mating groove for damage, debris, or corrosion before seating the new O-ring.