PACKING - U CUP (Nissan NI70018-FA066)

A worn U-cup packing can allow fluid leakage past the seal, reducing system pressure and causing erratic movement. This aftermarket replacement part references Nissan as the OE maker and cross-references part number NI70018-FA066. The U-cup packing functions as a dynamic seal that prevents fluid from escaping along a reciprocating rod or piston. Over time, the sealing lip can harden or crack, leading to external drips or internal bypass that compromises consistent force output. In a typical application, this seal is installed in a gland or housing where it must withstand repeated sliding contact. The item ships at approximately 0.008 POUNDS. Verify the serial number or application, then call (562) 693-7748.

Part number variants: NI70018-FA066, ni70018-fa066, NI70018FA066, ni70018fa066