Hi, I got my new front axle , the snap ring type that takes a bolt in the inner end with a washer for extra retention. I failed to order the bolt and am afraid of ruining the threads unless I get it right (axle is installed). What is the bolt size and thread type. It appears to be 3/8" but a 3/8 National coarse only turns by hand a turn or turn and a half before fetching up, it looks like national coarse maybe just needs the hole chased with a tap. If SAE which I would think it is it will be either NC or NF unless by some weird turn of events it is metric. Any tips would be greatly appreciated. Eldon