Value Collection ZMSCH90211 O-ring Dash 211 Nbr 90 Duro 50-pack

Product Description

The VALUE COLLECTION ZMSCH90211 is a Dash 211 Nitrile Butadiene Rubber (Buna-N) O-ring designed for sealing applications in fluid and pneumatic systems. It measures 0.813 inches inside diameter, 1.063 inches outside diameter, and 0.125 inches thick, with a round cross-section profile. Rated at 90 durometer, this is an extra-hard compound that resists compression set, tearing, and abrasion. The operating temperature range spans -40 to 250 degrees F, making it suitable for demanding service environments. Licensed HVAC technicians, plumbers, and mechanical contractors reach for Buna-N O-rings as the industry workhorse for petroleum-based fluid containment.

Buna-N O-rings in the Dash 211 size are commonly used in HVAC equipment, refrigeration service valves, hydraulic fittings, pump seals, plumbing unions, and general mechanical assemblies where contact with petroleum products, oils, fuels, or water is expected. The 90-durometer hardness makes this compound particularly well-suited for high-pressure applications where extrusion resistance is a priority. This listing is packaged in a quantity of 50, appropriate for shop stock, service vans, or production use.

Key Features

• Buna-N (Nitrile Butadiene Rubber) material — the most widely used O-ring elastomer for petroleum product compatibility
• 90 durometer extra-hard compound provides excellent resistance to compression set and extrusion
• Operating range of -40 to 250 degrees F suits a broad range of HVAC, plumbing, and hydraulic service conditions
• Round cross-section, Dash 211 standard sizing for drop-in replacement into existing grooves
• Meets SAE and MIL-Spec standards
• Sold in a pack of 50 for shop stock or multi-unit service work

Compatibility

Designed for use with petroleum products, oils, fuels, and water-based fluids. Not recommended for exposure to ozone sources, direct sunlight during storage, or environments near motors and electrical equipment that may generate ozone. FDA approval is not indicated for this part.

Installation Notes

O-ring installation is performed by licensed HVAC technicians, plumbers, and mechanical contractors depending on the application. Always relieve system pressure and shut off fluid supply before disassembling any joint or fitting. Apply a compatible lubricant to the O-ring before seating to prevent twisting or tearing during assembly. Inspect the groove and sealing surfaces for nicks or burrs that could compromise the seal before installing a new O-ring.