double ended hex bolt

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.


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Stainless steel is an alloy primarily composed of iron, carbon, and a minimum of 10.5% chromium. This unique composition grants stainless steel its notable resistance to corrosion and oxidation, making it an ideal material for foundation bolts, especially in environments where exposure to moisture, chemicals, or extreme temperatures is a concern. The alloying elements in stainless steel also contribute to its strength and durability, ensuring that foundation bolts can withstand significant stresses without deforming or breaking.


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