568-390 EPR 70 O RINGS

This EPDM 70A O-Ring, item E70390, is designed for buyers who need a clear specification match for industrial fluid sealing, equipment repair, pumps, valves, cylinders and general maintenance applications. The item is specified by AS568-390; 20.953 inch (532.21 mm) ID x 0.21 inch (5.33 mm) CS; 21.373 inch (542.87 mm) OD, with 21 inch nominal ID; 3/16 inch nominal CS for cross-reference against common gland and replacement dimensions. Its EPDM (EPR) material provides water, steam, weathering and outdoor sealing applications where petroleum oil exposure is not the primary requirement. It is with a listed temperature range of -65°F (-53.9°C) to 300°F (149°C), which can help narrow material selection for heat, cold or process exposure. The black color and round profile provide a practical visual identifier during receiving, stocking and installation. This standard industrial O-ring can be used across compatible static and dynamic sealing applications in pumps, valves, cylinders and assemblies. The each-unit format supports precise replacement, kitting, resale and job-specific purchasing. Common purchasing identifiers for this product include the material name, O-ring type, dimensional size, hardness and intended sealing application. Those attributes make the item easier to compare for maintenance, OEM production, MRO replacement and reseller catalog use.