Bolt grades are closely related to tensile strengths. In layman’s terms, the tensile strength of a bolt refers to the maximum stress the bolt can withstand before breaking. Thus, the higher the tensile strength, the higher the weight a bolt can sustain and the higher its capacity to bear impact.High tensile bolts are used for high-stress fastening applications. For example, you would usually require high tensile bolts in the realms of construction or other similar industrial environments. These high tensile bolts help to secure heavy objects together and shoulder their weight for many years, or even decades.