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1. Better Grip and Reduced Stripping One of the primary benefits of fine thread screws in wood is their ability to create a tighter grip. The closely spaced threads increase the surface area in contact with the wood, leading to enhanced holding power. This is particularly beneficial when working with softwoods or when the wood is prone to splitting.

The functionality of metal expansion nuts centers around the principle of mechanical expansion. Upon the application of torque, the screw or bolt is threaded into the nut, which, in turn, causes the nut to expand outward. This outward expansion presses the sides of the nut against the inner walls of the hole it occupies, creating a tight fit. The added friction and mechanical grip prevent the nut from loosening over time, even in dynamic conditions.