Sealing bolt and method of installing a sealing bolt

A sealing bolt for sealing a container lid to a container body, said sealing bolt comprising:

• a seal head adapted to be mounted to said container lid;
• a seal stud adapted to be mounted to said container body;
• a pin connecting said seal head to said seal stud,
• a conductor arranged through a transverse passage in said pin,
• a resilient member arranged for biasing the pin into a first position in which the conductor is compressed, wherein the pin is movable against the biasing by the resilient member into a second position by application to the seal head of a predetermined torque, and
• a monitoring and detection unit, the monitoring and detection unit including a transmitter and a detector coupled to respective ends of the conductor, a processor, coupled to the transmitter and the detector, the processor being operable to determine that the pin has been moved into the second position for a first time when it determines that a signal detected by the detector has undergone a predetermined change.