Bi-Metal Self-Drilling Screw combine two steels to yield best-in-class performance, from efficient self-drilling to decades of rust-free security.

Corrosive damage is pertinent to all construction jobs and should therefore be accounted for during the design phase of any project. Often observed as “rust”, corrosion is the progressive deterioration of metals through an oxidation process.

In practice, corrosive damage results in an unpleasant building appearance, compromises structural integrity, and damages internal building structures. Fortunately, proper project planning can absolve architects, designers, and contractors of these potential issues.

Not all stainless steel is created equal. While all offer some degree of corrosion resistance, none matches the protection of 300 series metals. This includes the ever-popular 400 series steels; though suitable for some applications, it is vulnerable to Hydrogen Assisted Stress Corrosion Cracking (HASCC) and can develop harmful rust with prolonged exposure to harsher elements. This jeopardizes the integrity of the screw’s connection by weakening

• Pull out values
• Shear strength
• Tensile strength
• Ductility

For this reason, DD Fasteners engineered its ultimate self-drilling bi-metal fastening solution using 304 stainless steel, resilient enough to stand up to dissimilar metal connections, pollution, and highly corrosive environments without compromising connection integrity.

Avoid dangerous and costly corrosion-based failures by choosing the right fastener the first time.

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