Austenitic Bi-Metal Self Drilling Screws for Windows, Flat Head #2 Phillips, 304/A2 & 316/A4+420, Point No.3

Our Austenitic Bi-Metal Self Drilling Screws are specialized fasteners engineered specifically for window and door installations, particularly with reinforced PVC profiles. Featuring a flat countersunk head, #2 Phillips drive, and Point No.3 drill tip, these screws combine the corrosion resistance of 304/A2 or 316/A4 austenitic stainless steel with the drilling hardness of AISI 420 steel. This bi-metal construction delivers exceptional performance: they drill faster, hold stronger, and prevent rusting, even in demanding environments. With a maximum drilling capacity of 3.0mm, they provide reliable, long-lasting fastening for window frames and PVC profiles.
Key Features
Austenitic Bi-Metal Construction: Combines 304-A2 or 316-A4 stainless steel body with AISI 420 drill point, offering superior corrosion resistance and high drilling hardness for extended service life.
Flat Countersunk Head: Installs flush with the surface, providing a neat, low-profile finish that won’t protrude or interfere with window operation.
#2 Phillips Drive: Standard Phillips recess ensures compatibility with common screwdrivers, enabling easy and stable installation without slipping.
Point No.3 Drill Tip: Precision-engineered drill point allows fast, efficient self-drilling with a maximum capacity of 3.0mm, eliminating pre-drilling and speeding up window assembly.
Optimized for PVC Profiles: Designed to work with reinforced PVC window frames, preventing splitting or cracking while maintaining strong holding power in composite materials.
Superior Fastening Performance: Delivers stronger grip and pull-out resistance compared to standard screws, ensuring windows remain securely fastened over time, even with thermal expansion and contraction.
Common Applications
Fastening reinforced PVC window and door profiles
Assembly of aluminum and composite window frames
Installation of window hardware and accessories
Residential and commercial window construction projects
Outdoor and humid environment window installations requiring rust-proof fasteners