I have a Jannd just for that. What about zip ties? I'm going to invest stock in those
Zip ties are good; lots of little things to keep in your kit - extra spokes, extra bolts of various sizes, extra cleat(s), etc. Speaking of Surly hubs, I was almost out of the race in first hours, as one of the wheel fixing bolts from my surly hub came out (operator error). Made a most awful sound, as the wheel was out of alignment as the front disk was dragging on the brake. Luckily, I had an extra bolt the right size (M6 - what else on my bike uses that?!) - no idea why I brought one - and I made a washer out of a Crank Bros. cleat. That could have been a painful missing part. It's incredible I even caught the problem.