RE: What do the numbers on bolts signify?
THE FIRST NUMBER IS IN 64'S of an inchTHE DIAMETER IS 22/64
THE SECOND NUMBER IS IN THOUSANDS AND IS WALL THICKNESS SO THE WALL OF THAT SHAFT IS 16 THOUSANDS THICK.
Also we call them arrows not bolts I believe that historicly a bolt was the steel cross bow shaft that was steel with a pile head and use to penatrate a knights armor. Lee