What is the relationship between torque and
flat load?

Torque is the rotational force applied to a bolt to tighten a Belleville disc spring. Flat load is the amount of axial force required to flatten a Belleville disc spring.

Flat loading a Belleville disc spring helps to ensure that bolts do not loosen while machinery is in use. Flat loading will help prolong the life of your equipment and ensure proper functioning.

Different springs require different amounts of torque to be flat loaded, depending on the design and material. As with all Belleville disc springs, the design depends on the engineering specifications.