5.7MM CS X 299.3MM ID BLACK EPDM 70D

The E5.7X299.3 is a black EPDM (EPR) 70 Shore A O-Ring with an inside diameter of 299.3 mm (11.783 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 310.7 mm (12.23 in). This o-ring remains the most cost-effective sealing element available for pressurized assemblies. Supplementary detail from the product record: Metric O-RING, JIS G300.

EPDM (EPR) is valued for good electrical insulating characteristics, excellent hot water and steam resistance. The compound resists water and steam, phosphate ester hydraulic fluids, and ozone, UV and weathering. Published continuous service range is -65°F (-53.9°C) to 300°F (148.9°C). Verify compatibility before use with mineral oil-based lubricants or petroleum oils and fuels.

Maintenance and OEM teams specify it across potable water applications, solar and roofing assemblies, and outdoor equipment.

Stocked as E5.7X299.3 and sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.