5.7MM CS X 174.3MM ID BLACK BUNA 90D

Part number H90M5.7X174.3 is a black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 174.3 mm (6.862 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 185.7 mm (7.31 in). An o-ring compresses into its gland to block fluid or gas migration across a joint. Source specification: Metric O-RING, JIS G175.

Buna-N (Nitrile) is specified here for economical choice for high-volume maintenance programs and most widely specified general-purpose sealing elastomer. It resists hydraulic fluids, many alcohols, and petroleum-based oils. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving strong acids or ozone and direct sunlight call for a different compound.

Maintenance and OEM teams specify it across construction equipment, automotive, and agricultural equipment.

H90M5.7X174.3 ships individually. Unit weight is approximately 19.948 g. As always, verify media compatibility and operating conditions against the requirements of your specific application.