The only marking on the nut is the manufacturer's logo, "PAL", as in Palnut, there are no other markings. That is from originals. The AMK nuts are very close to originals, although the logo is partially filled in with something (heavy plating?), so it's very faint. I have an AMK set still in the bag. They do have a part number - 370546-S100 (-S100 is with sealer). AMK sell them with and without the sealer.
Jim