If you are replacing with Hollowtech 2 (external cups) all you need to know is press fit or threaded. In your case it is threaded. English threaded. Hollowtech 2 uses the same bottom bracket for 68 and 73 shells, with spacers for 73mm shells. The spindle (what someone on this thread is calling axle) is attached to the crank arm so there is only one length.