Differential bolt size

[Hfyvr]

For those of you that have changed the diff cover or replaced bolts. What’s the correct size?

I see two sizes called out on multiple forums. Some say 5/16, other sites like Ford parts lists an M10 bolt as being compatible with a 2023 9.75.

Thanks!

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[FaaWrenchBndr]

I believe I used an m10x 1.5