Truss / Button head self-drilling screws are corrosion resistant, precision fasteners. As they are self-drilling screws, the need to drill a pilot hole is eliminated. However, its usage should be accompanied by a washer to make sure that the fastener does not move with constant usage. It also reduces the impact of surface-to-surface fastening on both the surfaces. Truss/ Button head screws are generally weaker than any other type of screws, but they are preferred in applications requiring low clearance above the head. They can also be modified to reduce the clearance even further, while also increasing the surface of bearing.
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