Philips Drive Truss Head Self-Drilling Screw – 4.2mm x 1-1/4″ & 4.2mm x 3/4″

Description

These 4.2mm truss head self-drilling screws are designed for high-production fastening in light-gauge steel framing, metal cladding systems, and HVAC ductwork. The wide, low-profile truss head distributes clamping force over a larger bearing area than standard pan or hex heads, preventing pull-through in thin metal sheets and providing a clean, low-profile finish. The drill-point tip eliminates pre-drilling, allowing the screw to drive directly through metal substrates at speed. A Philips drive recess offers broad driver compatibility with standard #2 Philips bits. Available in two lengths — 3/4″ for thinner gauge applications and 1-1/4″ for deeper fastening — both in a bright zinc finish for corrosion protection. Popular in commercial construction, metal roofing, and industrial fabrication.