2K3258 - RING-BACKUP (RUBBER) 306144 Fits Caterpillar (Fits CAT) !!!0!One New Aftermarket Replacement Rubber Backup Ring for Caterpillar (Cat) Equipment This rubber backup ring (part number 2K3258 2K 3258) is used in high pressure static and dynamic sealing applications including hydraulic pumps, valves, and engine systems. With an internal diameter of 145. 35mm, it is manufactured from urethane rubber offering excellent abrasion and cut resistance, compatible with petroleum based lubricants and hydraulic fluids. Not
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