What is a "torque specification" for a bolt?

A torque specification for a bolt refers to the specific amount of twisting force that must be applied in order to properly tighten the bolt. This specification is crucial because it ensures that the bolt is fastened securely without being over-tightened, which could potentially damage the bolt or the materials it is fastened to. It takes into consideration factors such as the material being used, the size of the bolt, and the application for which the bolt is being used. Following the correct torque specification is essential for maintaining the integrity and performance of a mechanical assembly.

The other options do not accurately describe what a torque specification entails. For instance, the amount of pull required to remove a bolt pertains to its removal, not securing it, while the length of the bolt refers to its physical dimensions rather than the force applied. Similarly, a bolt's weight capacity speaks to its load-bearing capacity, which is a separate consideration from the torque needed for installation.