What are flexible couplings in steering columns commonly referred to as?

Flexible couplings in steering columns are commonly referred to as rag joints. These components are designed to absorb vibrations and allow for misalignment in the steering system. Rag joints consist of a rubber or fabric material that connects two solid parts, ensuring smooth operation while also providing some flexibility. This flexibility is crucial as it helps accommodate the various movements and stresses that occur during steering, contributing to overall vehicle safety and handling performance.

The other terms listed, while they may describe different components or usages in mechanical systems, do not accurately reflect the common terminology used in the context of steering columns and their couplings. Thus, the term "rag joints" is the correct and widely accepted phrase among automotive professionals.