Sure Grip vs open carrier cross pin size

Just got my Dana Spicer 75101X Trac Lok the other day, and I noticed the bolt that holds the cross pin in place had a 12 point head that seemed considerably smaller than the 6 point 5/16 bolt in my open carrier. I wanted to swap them out, but soon found out I couldn't. Seems as if the new Trac Lok bolt is 6x1.25, and the open carrier is, as I said, 5/16 coarse.

Even the cross pins themselves are different sizes, again with the Trac Lok being smaller in diameter.

I'm not too concerned with the size difference. The only reason I wanted to replace the 12 point bolt with a 6 point is because I feel better about breaking it loose if I have to get in there for any reason in the future.

Anyone else have this experience? To be clear, it is a genuine Spicer part.

I did not take pictures of the cross pins, but I remember the open carrier pin being 0.8" and the Trac Lok was around 0.716.

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