Im looking to replace the front and rear bolts that hold the calipers on the axle/hub/w/e and I dont have them in the same state as me :-\ does anyone happen to know the length, thread pitch size etc of them?

 

I had to replace one on my 89 GTU the last time I changed the brake pads and the only place you can find them are through the Mazda dealer. They need to be the correct tensile strength because of all the stress they're put under holding the caliper to the car during braking so you can't use an off the shelf bolt from the local hardware store. They are also threaded in the middle of the bolt and not on the ends. You'll only find 'em in junkyards and the dealers' stockroom, if they have a few laying around.