Value Collection ZMSCH90212 O-ring Dash 212 Nbr 90 Duro 50pk

Product Description

The VALUE COLLECTION ZMSCH90212 is a Dash 212 Nitrile Butadiene Rubber (NBR/Buna-N) O-ring sold in a pack of 50. It measures 0.875 inches inside diameter, 1.125 inches outside diameter, and 0.125 inches thick, with a round cross section and a 90 durometer (extra hard) hardness rating. The temperature range spans -40 to 250 degrees F, making it suitable for a wide variety of hydraulic, pneumatic, and mechanical sealing applications. HVAC technicians, plumbers, and mechanical contractors install this O-ring as a static or dynamic seal in systems where petroleum-based fluid compatibility is required.

This O-ring is well suited for use in petroleum-product environments, including hydraulic systems, fuel handling equipment, refrigeration service connections, and general fluid-power assemblies found in both residential and light commercial mechanical systems. The Buna-N compound is the most widely used O-ring elastomer in the trade, valued for its compression-set resistance and tear and abrasion resistance. The 50-piece pack quantity suits service technicians who carry common sealing sizes in quantity for repeated maintenance calls.

Key Features

• Buna-N (NBR) compound with excellent resistance to petroleum products and hydraulic fluids
• 90 durometer extra-hard rating resists extrusion in higher-pressure applications
• Operating temperature range of -40 to 250 degrees F for broad service compatibility
• Round cross section with consistent 0.125-inch thickness for reliable sealing contact
• Meets SAE and MIL-Spec standards
• Pack of 50 units — practical quantity for field service or shop stock

Compatibility

Compatible with petroleum products and petroleum-based hydraulic fluids. Designed as a Dash 212 standard O-ring for use in any port, fitting, or gland machined to the Dash 212 AS568 cross-section profile.

Installation Notes

O-rings should be installed by a qualified technician familiar with the sealing requirements of the system being serviced. Always depressurize and de-energize the system before replacing seals. Lightly lubricate the O-ring with a compatible fluid or grease before installation to prevent twisting or tearing during assembly. Do not store unused O-rings in direct sunlight or near motors and other electrical equipment that may generate ozone, as this degrades the elastomer over time.