Sorry for the late late response. I just wanted to say that is the cap for the thrust piece. That nut is just a cap. Be careful as I found two of these froze to the thrust piece when I was looking for a new one. There is also a 13mm? nut under the power steering pump bracket hard to explain that holds the thrust piece in think of it as a grub screw. Send me a message if you have any more questions sometimes I forget to look at my threads.

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