568-349 BLACK HNBR HSN70 O-Ring

Item HSN70349 is a Hnbr 70A O-Ring built for industrial fluid sealing, equipment repair, pumps, valves, cylinders and general maintenance applications. The item is specified by AS568-349; 4.475 inch (113.67 mm) ID x 0.21 inch (5.33 mm) CS; 4.895 inch (124.33 mm) OD, with 4 1/2 inch nominal ID; 3/16 inch nominal CS for cross-reference against common gland and replacement dimensions. The HNBR compound is selected for abrasion resistance, heat aging resistance and performance in many oil, refrigerant and fluid power applications. It is with a listed temperature range of -40°F (-40°C) to 325°F (163°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. Key selection details include material, hardness, product type, cross-section, inside diameter, outside diameter and application. These specification details help customers and resellers compare the part by performance requirements rather than brand name alone.