There is a wealth of information i am getting on here, and i understand some of the frustration also. I am away from the machine at the moment until next week for work so i was trying to get the right size to be ready to go when i get back to it. as i said my last try-s didn't produce any fitting bolts i had on the farm. and the one's i ordered did not fit after an overnight delivery....but i/we will find it and i will let you guys know what it is when we do. also as for the tap and die questions and the question of is the hole threaded. yes i do own a tap and die set..at the farm. yes the holes are threaded. thanks