EC21 Product Catalogs - pc cam 168 http://www.ec21.com/ec-market/pc cam 168.html Compressor Spare Part,Refrigerationhttp://ehanstech.en.ec21.com/Compressor_Spare_Part_Refrigeration--288903_379905.htmlpc 40/B Lock nut 1pc 41/A Shaft seal ring 41/B Shaft seal ring 42/A Shaft seal ring O ring P46 42/B Shaft seal ring O r20091029