Mungo 5220171

Professional Summary

• Manufacturer: Mungo (Switzerland)

• Article / Part Number: 5220171

• Product Line / Type: Metal Frame Wafer Head Screw / Structural Sheet Metal to Steel Fastener

• Material & Coating: High-grade hardened Carbon Steel, Zinc Plated (engineered for high protection against oxidation and construction-site moisture).

Dimensions & Installation Specs

• Screw Diameter ($d$): 4.2 mm (increased diameter for higher shear strength)

• Total Length ($L$): 35 mm

• Drive Type: PH2 (Phillips No. 2) (standard crosshead for precision stability and high torque transmission).

• Tip Type: Self-Drilling Drill Point (Сверло) — cuts through thicker steel profiles cleanly without pre-drilling.

• Head Type: Wafer Head (Flanged / Пресс-шайба) — low-profile ultra-flat head with a broad integrated washer.

Key Features & Engineering

• Reinforced Diameter: The 4.2 mm gauge provides superior shear resistance compared to standard 3.5/3.9 mm screws, making it ideal for structural framing joints.

• Ultra-Flat Wafer Head: The broad, low-profile flange maximizes surface contact area to clamp sheets tightly under high tension, remaining flush to allow smooth finishing.

• Rapid Self-Drilling Point: The integrated drill tip is calibrated to instantly bite and tap through thicker steel framework connections (up to 2.5 mm total thickness) without walking.

• Structural Reliability: The fine thread and high-tensile steel construction ensure a permanent, vibration-proof lock in demanding metal construction environments.

Application Range:

Fastening load-bearing structural metal tracking and studs, heavy-duty suspension hangers, thick metal cladding frameworks, and structural steel reinforcement connections.