3.5MM CS X 49.7MM ID BLACK BUNA 90D

The H90M3.5X49.7 is a black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 49.7 mm (1.957 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 56.7 mm (2.23 in). This o-ring remains the most cost-effective sealing element available for pressurized assemblies. The catalog record notes: Metric O-RING, JIS P50.

Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. The material holds up against hydraulic fluids, water, and greases and lubricants. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Exposure to strong acids or automotive brake fluid will shorten service life.

Maintenance and OEM teams specify it across automotive, hydraulic and pneumatic systems, and fluid power.

This item is sold individually under part number H90M3.5X49.7. Unit weight is approximately 2.2564 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.