Value Collection ZMSCH70335 O-ring Dash 335 Nbr 70 Duro 25pk

Product Description

The VALUE COLLECTION ZMSCH70335 is a Dash 335 Buna-N (Nitrile Butadiene Rubber) O-ring with a round cross section, sold in a pack of 25. It measures 2.75 inches inside diameter, 3.125 inches outside diameter, and 0.1875 inches thick. Rated at 70 durometer (hard), this O-ring handles a working temperature range of -40 degrees F to 250 degrees F. It offers excellent resistance to petroleum products along with strong compression set, tear resistance, and abrasion resistance. Plumbers, HVAC technicians, and industrial maintenance professionals install this O-ring as a sealing element in fluid and gas systems where petroleum-based media are present.

This O-ring is suited for residential and commercial plumbing, HVAC, hydraulic, and pneumatic applications where a Dash 335 NBR seal is required. Its compatibility with petroleum products makes it a practical choice in fuel systems, oil lines, and hydraulic fittings. The 25-piece pack quantity supports service van stock and routine maintenance situations where multiple seals may be needed in a single job or across several service calls.

Key Features

• Buna-N (NBR) elastomer — the most widely used O-ring material for petroleum-service applications
• Dash 335 standard sizing: 2.75 inches ID, 3.125 inches OD, 0.1875 inches thick
• 70 durometer hardness rating for firm seating and reliable compression set
• Operating range of -40 degrees F to 250 degrees F
• Round cross section for consistent sealing geometry across standard grooves
• Meets SAE and MIL-Spec standards
• Sold in a pack of 25 for stocking and multi-unit service use

Compatibility

Compatible with petroleum products and petroleum-based fluids. Designed as an OEM-style replacement or service-stock O-ring for any application requiring a Dash 335 NBR seal in HVAC, plumbing, hydraulic, or pneumatic systems. Not recommended for storage in direct sunlight or near motors or electrical equipment that may generate ozone.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or industrial maintenance mechanics. Before replacing any O-ring, shut off and depressurize the system and relieve any residual fluid pressure. Lightly lubricate the O-ring with a compatible fluid or grease to ease seating and reduce the risk of rolling or tearing during assembly. Inspect the mating groove for nicks, corrosion, or debris before installing the new seal.