Assuming you are talking about the pin and box connector for riser connection here.
Riser connectors are mounted on the riser connector box, when actuated it mates with a profile machined into the outside diameter of the riser pin. When the complete connector made up, the connection supports all tensile bending and fatigue loads.
Furthermore, choke & kill, booster, auxiliary and hydraulic lines are attached to riser connector pin and box with lock and jam nuts. All lines are interchangeable with the choke & kill lines designed for working pressure exceeding 10,000 psi. Booster and hydraulic lines are designed for working pressure of 6,000 psi max.
Here is the link to a little more info on the pin & box connector. http://www.ognition.com/842/flange-type-connectors-and-type-connectors-for-riser-joints
Hope that helps.