I've been banging my head for a day or so trying to find a supplier for black machine screws in M3 and M5 dimensions (preferably also black nuts). When looking at RC and computer stores every possible colour is available, but only in M4 and smaller. If I look at MC stores there's only aluminium. If I look at British or American sites there's a very limited supply of metric dimensions. I've had some luck on eBay, but wanted to ask if someone knows of any other website that sells such a thing.