Generic Self-Drilling Hex Head Screws 5.5mm x 25mm with EPDM Gasket (200pcs)

Hex Head Self-Drilling Screws

The Self-Drilling Hex Head Screws offer a high-performance fastening solution for industrial infrastructure and metal assembly projects. These fasteners utilize a precision-engineered #3 drill point to penetrate structural steel without requiring pilot holes. Each unit integrates a high-density EPDM rubber gasket to ensure a weather-tight seal and prevent moisture ingress at the fastening point. This architecture significantly reduces installation time while maintaining high pull-out resistance across various substrates.

Key Features

• Integrated EPDM Sealing Gasket
  The bonded rubber washer provides a resilient barrier against environmental factors and chemical exposure in industrial settings.

• High-Torque Hex Drive System

  • Compatible with standard 8mm (5/16″) hex drivers
  • Minimizes cam-out during high-RPM installation

• Zinc-Plated Carbon Steel Construction
  The hardened steel core provides superior shear strength while the zinc coating offers essential corrosion protection.

• Self-Piercing Drill Point
  The #3 drill flute effectively clears debris during the drilling phase to prevent thread clogging and overheating.

Specifications

What’s in the Box

• 200 x 5.5mm x 25mm Self-Drilling Hex Head Fasteners with Bonded Gaskets

Why Choose This Fastening System

• The specialized drill point eliminates pre-drilling stages in cold-rolled steel up to 4.5mm thickness.

• Thermal stability within the EPDM component prevents cracking during extreme temperature fluctuations in outdoor deployments.

• Zinc passivated coating ensures the hardware resists oxidation in humid data center or warehouse environments.

• The bulk 200-piece distribution provides cost-effective procurement for large-scale cable tray and containment mounting.

• Additionally, the wide flange head distributes clamping pressure evenly to prevent substrate deformation during high-torque application.