5.7MM CS X 349.3MM ID BLACK BUNA 70D

Ordered as H5.7X349.3, this is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 349.3 mm (13.752 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 360.7 mm (14.2 in). The o-ring remains the most cost-effective sealing element available for pressurized assemblies. Source specification: Metric O-RING, JIS G350.

Buna-N (Nitrile) is specified for low compression set under sustained load and an economical choice for high-volume maintenance programs. The compound resists propane and butane, greases and lubricants, and many alcohols. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with ketones or ozone and direct sunlight.

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

H5.7X349.3 ships individually. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.