Oak shortbow (u)

An Oak shortbow (u) is cut from Oak logs at level 20 Fletching, granting 16.5 experience. An unstrung oak shortbow can be strung using a bowstring at 20 fletching, granting an additional 16.5 experience for a total of 33 for a single bow. The unstrung bow then becomes an Oak shortbow.

It takes 15 seconds to string an inventory of 14 shortbows. With banking time, this means players can potentially string 3 inventories a minute, which is 180 inventories an hour, for 2,520 bows in total. This means that the experience gained per hour is roughly 0 Fletching experience.