Hardness testing is one of the fastest ways to confirm whether a hex bolt has the strength and heat-treatment condition its grade requires. Because hardness is closely tied to tensile performance and brittleness, a result that falls outside the specified range can signal risks such as premature stretching, poor clamp load, or sudden fracture in service. This article explains how to check hex bolt hardness properly, including suitable test methods, where and how measurements should be taken, and how to interpret the results against relevant standards so you can judge bolt quality with confidence.
Send Email
