ORIGINAL: aerowoof
good luck tying to find any screws or nuts with British Standard Whitworth thread at any hardware store in the us.
Sorry, I wasn't aware we were talking about a British engine.[&:] They were originally produced in Italy, but are now being produced in China. I would think they would be using metric thread at this point, but I could be wrong!! If so then you are correct in that the local hardware store might not be the answer unless you buy a tap from them & re-thread it so that you can use bolts that are readily available. Nothing burns me up worse than paying 5 or 6 bucks in shipping for a .20 cent screw![:@]