The 12-24 x 85mm self-drilling screw is built for heavy-duty connections into thick steel without pre-drilling. Its No.5 drill point and fine 24 TPI thread ensure secure engagement, while the 5/16″ hex head delivers strong clamping. The Class 4 corrosion-resistant coating provides long-term durability in exposed installations. Ideal for structural fastening, heavy cladding and fabricated steelwork.

• Extra length for thick steel assemblies,Class 4 coating for harsh environments

$136.60

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