Greetings,

Anyone know of a source for brake pad retaining screws. The typical one I have experience with are M4 x 5.5 mm long, with a very small 2.5 mm hex head. Noting close on McMaster-Carr, or any of the other sources I'm familiar with. The brake pad retaining screws on a couple of friend's bikes have the small hex head stripped. One was Shimao 105, the other was Trek SpeedStop brake setup. Any sources much appreciated, thanks in advance.

Try your local bike shops. Also it helps to use some good quality hex wrenches when undoing such small screws. Some cheaper ones are made of soft metal and sloppy tolerances and easily strip the screw heads. I usually end up grinding down my 2.5mm allen wrenches a couple of mm after a few uses just to have fresh and sharp hex corners.

Industrial hardware stores .. (here we have commercial fishing boats to keep running)
Computer science Code writers moving in, and the cost of real estate escalating,
may have driven them out of your city..

bins in bike shops is always a place to look..

These screws are effectively disposable screws, often the new pads will come with them (Shimano and Swissstop do) Get a set of those pads, and your sourcing problem is resolved.

Are you sure McMaster dosen't have something ?
I'm seeing M4 x 5mm SS button heads with 2.5mm drive here :
https://www.mcmaster.com/92095a477

Greetings all,

Thanks, for all the tips, and especially for the McMaster-Carr link. Got it. Thanks