This is High pressure shaft seal 40*60*12 /TCN oil seal AP2379 40*60*12 OR 40-60-12 OR 40X60X12, mainly used in Shaft of Hydraulic pump, especially is hydraulica pump / mortors  , those pumps usually are usred in roader roller, land scraper, shovel loader, self-discharging car, mixer truck and excavators etc. 
 
High pressure seals, such as the Type TCN, is designed for high pressure applications where continuous pressure may reach 150psi(10.6kg/cm2). Maximum pressure limit is dependent on shaft speed.
 
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Email: info@hydraulicpumpseal.com