Where to find bolts for an old Raleigh Bicycle? The college kid in our family has a old/ancient Raleigh 3 speed bike with long fenders.  Those fenders are held in place with a strange bolt that is threaded on both ends and has a head near one end.

The short end is screwed into the frame, the long end accepts the fender rods, and then a bolt tightens down on them.

I removed the bolt with an 11/32" socket, but the closest fit I can find is a metric size.  However that fit is either too loose (5mm 0.8) or too large (6mm 1.0).  So I'm guessing some wonky British bolt, or some proprietary Raleigh bolt.  Anyway, do you know of any place that might have bolts that fit this kind of bike?

I've emailed the local Raleigh bike shop and either they don't know how to work their email, or they have no answer....





Image from comments, in-lined to prevent link rot.
I spent my formative years in a Raleigh Five Star Dealership that just so happened to buy up all of the vintage Raleigh mudguards of the steel type for 26" wheel 3 speed bikes. (Raleigh had a warehouse clearance.) That was in the UK and we had mudguards for everything going back to AFTER the requirement for the white panel on the rear mudguard. Nothing from the the 70's onward had the bolt type you describe, although we also had a lot of frames including ones with the 7/32" x 26 TPI eyelets. Sounds to me that you either have a U.S. special, something really obscure, something really, really old or something after-market.

I suggest that you put some new mudguards on there. It will be a lot less hassle.
For those new mudguards you can drill out the existing holes or use 5mm nuts and bolts, obviously with a fair few washers in there.

If you want to keep the retro look of the existing mudguards, you could make your own 'P' clips with a bit of tin, some snips and a drill. These could then be attached with a metric nut and bolt.