Connection Between Bolt Tightening Torque and Bolt Coupling Torque Capacity

Hello,

Can someone please explain to me the connection between the torque calculated for tightening a bolt, and the torque capacity of a a circular bolt coupling consisting of n bolts?

The torque required to produce a given preload (source: Shigley's Mechanical Engineering Design):T=K*F*d

K=torque coefficient (taking into friction into consideration)

F=preload, clamping force

d=bolt nominal diameter

Now, after I calculated the preload and tightening torque needed for a specific bolt, I have a flanged bolt coupling consisting of 6 equally spaced bolts. The flange is supposed to rotate - how can I calculate the torque capacity of this bolt coupling, and how does it connect to the preload, friction and tightening torque, and where does the shear strength of the bolts come in? Would appreciate the attachment of the appropriate sources. Thank you!

FLANGED BOLT COUPLING