Subject pretty much covers it. I have an 86 NP208. I need to get my shaft in so I can wheel this weekend. These 4 bolts are the last thing I need to be ready to go! I had one guy tell me it was a fine thread 3/8, but I have coarse thread. So I got 3/8 coarse. They fall right thru. Another guy told me it was some oddball bolt I needed to get at GM. /forums/images/icons/smirk.gif Before I head back to the hardware store again in the morning, what size do I need? 7/16 coarse maybe? If it is a GM thing (which I dont possibly imagine) Ill go there if I have to.