Yes, those are the ones that you need to put the flex plate on the crank and the flex plate to the torque converter... The torque converter bolts should be 5/16" fine thread, and the crank I believe is 7/16" fine thread.... The torque converter bolts have a larger head on them than the standard 5/16" bolts to help distribute the load better....
Those are like the OEM ones, they also have some six point ones, but I prefer the factory style myself...