Value Collection ZMSCH70212 O-ring Dash 212 Buna-n 100 Pack

Product Description

The VALUE COLLECTION ZMSCH70212 is a Dash 212 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in fluid sealing applications. It measures 0.875 inches inside diameter, 1.125 inches outside diameter, and 0.125 inches in cross-section thickness with a round cross-section profile. Rated at 70 Shore A durometer hardness, this O-ring delivers firm sealing force while maintaining reliable compression set performance. It handles temperatures from -40 degrees F to 250 degrees F and is compatible with petroleum-based fluids. HVAC technicians, plumbers, and hydraulic system mechanics install these O-rings in fittings, valves, pumps, and fluid connectors throughout residential and commercial systems.

Buna-N O-rings are a standard consumable across HVAC refrigerant and oil circuits, plumbing shutoff valves, hydraulic fittings, and pneumatic assemblies where petroleum-fluid exposure is expected. The Dash 212 designation is a standardized sizing reference used by technicians to identify and cross-reference replacement O-rings across multiple equipment manufacturers. This part ships in a quantity of 100 units per package, making it practical for service vans, shop stock, and maintenance kits where frequent O-ring replacement is routine.

Key Features

• Buna-N (Nitrile Butadiene Rubber) material — excellent resistance to petroleum products, oils, and fuels
• 70 Shore A hardness rating — hard enough for positive sealing under sustained compression
• Operating temperature range of -40 degrees F to 250 degrees F
• Round cross-section with 0.125 inches thickness — standard Dash 212 geometry
• Good tear and abrasion resistance for dynamic and static sealing applications
• Meets SAE and MIL-Spec standards
• Package quantity of 100 units for shop stock or service kit replenishment

Compatibility

Compatible with petroleum products and petroleum-based hydraulic fluids. Conforms to SAE and MIL-Spec standards for Dash 212 O-ring sizing. Not recommended for exposure to direct sunlight during storage, or proximity to motors and electrical equipment that may generate ozone. Not FDA approved.

Installation Notes

O-ring replacement is performed by licensed HVAC technicians, plumbers, and hydraulic mechanics depending on the system. Always depressurize and isolate the system — shut off fluid supply and relieve all line pressure — before removing any fitting or valve containing an O-ring. Inspect the mating groove and seating surface for scoring or corrosion before installing the replacement. Lightly lubricating the O-ring with a compatible fluid or O-ring lubricant during installation helps prevent rolling or tearing during assembly.