Size of bolts holding diff to axle.

And, BSF is the fine thread variant of wait for it, Whitworth!

Don't you own a set of thread pitch gauges?

DO I own a set of pitch gauges?
No, not yet. Bunnings and Supercheap have them, none have BSF

Time to post this again?

https://youtu.be/tkEVwpl2S4Q'si=l3Vmmxd60EE5yzdG