What are bolt grades for U.S. and Metric bolts Understanding bolt “strength” terms You may think steel bolts are solid, stiff, or rigid. They’re not. It has a certain amount of elasticity. In other words, a bolt stretches when torqued. Think of a bolt as if it’s a spring or bungee cord that clamps pieces together. As it’s tightened to the proper torque, it stretches slightly and can handle a certain amount of additional stretch, yet keeps the pieces clamped together. The concept of bolt stretch is important to understand … Read More
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