Value Collection ZMSCH70430 O-ring Dash 430 Nitrile 70A

Product Description

The VALUE COLLECTION ZMSCH70430 is a Dash 430 Buna-N (nitrile butadiene rubber) O-ring with a round cross section, sized at 5.125 inches inside diameter, 5.625 inches outside diameter, and 0.25 inches thick. With a 70 Shore A hardness rating, this O-ring delivers firm sealing performance suited to dynamic and static applications. It is sold in a pack of 5 and weighs 0.02 pounds. Buna-N is the most widely used O-ring elastomer in the trade, offering excellent resistance to petroleum-based fluids along with strong compression set, tear resistance, and abrasion resistance. HVAC technicians, plumbers, and fluid system mechanics regularly specify this material for sealing joints exposed to oils, fuels, and hydraulic media.

This O-ring is used in residential and commercial applications wherever a Dash 430 seal is required, including pump housings, valve bodies, manifolds, and pipe fittings that contact petroleum-based fluids or hydraulic oils. The temperature range of -40 degrees F to 250 degrees F makes it suitable for both refrigeration-adjacent and hot-fluid piping contexts. It conforms to SAE and MIL-Spec standards, making it appropriate for plumbing, HVAC, and light industrial fluid systems. Pkg Qty is 5 units per pack with a minimum order quantity of 1.

Key Features

• Buna-N (nitrile butadiene rubber) material offers excellent resistance to petroleum products, hydraulic oils, and fuels
• 70 Shore A hardness provides firm compression set and durable sealing under pressure
• Wide service temperature range: -40 degrees F to 250 degrees F
• Round cross section for standard O-ring groove fitment
• Meets SAE and MIL-Spec standards
• Pack of 5 units per package for service stock and replacement needs

Compatibility

Designed as a Dash 430 standard O-ring replacement compatible with petroleum products and systems requiring Buna-N seals rated to SAE and MIL-Spec standards. Not recommended for use with ozone-generating equipment, motors, or applications with direct sunlight exposure during storage. Not FDA approved; not intended for food-contact applications.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, or qualified mechanics working on fluid system components. Depressurize and drain the system completely before removing or installing any O-ring seal. Lubricate the O-ring with a compatible petroleum-based lubricant before seating it in the groove to prevent twisting or damage during assembly. Do not store unused O-rings in direct sunlight or near motors or electrical equipment that may generate ozone, as this degrades nitrile rubber over time.