A sample from the products for the F-14 include: Bag,owners Manual, Set Illust*b116m* (jdm), Set Illu*nh114mu* (jdm), Set Illust*g142m* (jdm).
On this parts fiche the Nut,hex 6mm is the most specified component.
The Nut,hex 6mm is the lowest priced item on this F-14 schematic.