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Not true. The numbers on the body have no relation to the p/n. The same body is used for many p/n's as they vary mainly by wire length.
Also, the nuts are stainless M8-1.25 and they take a 12mm wrench if they are OEM nuts.
To be sure of part number, you need year, transmission, engine, 2wd/4wd and Cali or Federal in '99 or '00.
Go here:
Find My Part
Your right about the 12mm my mistake, couldn't remember, but the part numbers are stamped in on my old Denso's
