I bought a ballscrew off here and when it arrived (in perfect condition) I spotted the thread on the end was M12 x 1.0mm. Never even knew there was such a thread until I saw this one and I knew I wasn't going to find a nut for it - or so I thought....

I had to visit a shop in London to replace a couple of sheared fasteners on a machine at work and I off-handedly mentioned that I was looking for these fine thread nuts, and the guy disappeared out back and returned to with two M12 x 1.0 plain nuts, much to my amazement.

So, if you're looking for an odd-ball size nut, bolt or screw, or need these M12 fine thread nuts for ballscrews give them a try - he said he keeps all fine sizes down to M6.

Clerkenwell screws, 109 Clerkenwell Rd, London