What caliper bolts are these?

Im rebuilding my 300tdi axles and am stumped on what caliper bolts i should be using. I was told when purchasing my defender the axles were off of a 1994 discovery, and there is no visable part number on the axle itself. So far i have tried:

FTC3375
AFU1031
571910
591065

It seems like the front and rear caliper bolts are the same size and thread pitch. A picture of the old bolt compared to AFU1031:



Does anyone have any idea what they could be?

afu1031 is the new bolt in your pic ,for a300 tdi you need ftc3375 which is still bihex headed but a finer pitch

I used ftc3375 for 95 300Tdi. Pretty sure thats the one you will need?

James