These Austenitic Bi-Metal Self Drilling Screws feature Hex Washer Head, Point No.5 drill tip and specialized double thread design. Made of 304/A2 or 316/A4+420 bi-metal, they are designed for attaching insulated foam panels to steel purlins with max 12mm drilling capacity, offering superior corrosion resistance and enhanced holding power in heavy metal frame applications.

These Austenitic Bi-Metal Self Drilling Screws feature Hex Washer Head, Point No.5 drill tip and single thread design. Made of 304/A2 or 316/A4+420 bi-metal, they are designed for attaching metal rails to metal purlins with max 12mm drilling capacity, offering superior corrosion resistance and strong holding power in heavy metal frame applications.

Product Overview
These Austenitic Bi-Metal Self Drilling Screws feature Hex Washer Head, Point No.3 drill point and bi-metal construction (304/A2 & 316/A4+420). Designed for metal to metal and metal to purlin fastening with max 6mm drilling capacity, they offer excellent corrosion resistance with Ruspert or Dacromet coatings, ideal for heavy metal frame applications.
Key Features
Austenitic Bi-Metal Construction: Combines the corrosion resistance of 304/A2 or 316/A4 stainless steel body with the hardness of AISI 420 drill point, ensuring both durability and rust protection for long service life.
Hex Washer Head Design: Provides a large bearing surface for even load distribution, preventing pull-through and ensuring a secure, stable installation.
Point No.3 Drill Tip: Precision-engineered drill point enables efficient self-drilling with a maximum drilling capacity of 6mm, eliminating the need for pre-drilling holes and reducing installation time.
Double Thread Design: Optimized double thread geometry enhances grip and pull-out strength, ensuring secure fastening of insulated foam panels to steel purlins in heavy metal frame applications.
Ruspert or Dacromet Coatings: Premium anti-corrosion coatings provide extended protection against rust and environmental damage, making the screws suitable for outdoor and humid environments.
High Performance Specs: Recommended screw driver speed of MAX 2500 R.P.M. ensures optimal drilling efficiency and prevents overheating or bit damage during installation.
Common Applications
Attaching metal rails to metal purlins in construction projects
Fastening insulated foam panels to steel purlins
Heavy metal frame applications and structural installations
Metal to metal and metal to wood composite fastening
Outdoor construction projects requiring corrosion-resistant fasteners

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

Product Overview
Our Austenitic Bi-Metal Self Drilling Screws are industrial-grade fasteners engineered for heavy-duty construction and metal framing applications. Featuring Hex Washer Head, Point No.3 drill point, and bi-metal construction combining Austenitic stainless steel (304/A2 or 316/A4) with AISI 420 drill tip, these screws deliver exceptional drilling performance, corrosion resistance, and long-term durability. With a maximum drilling capacity of 6mm and double thread design, they are optimized for attaching metal rails to metal purlins and insulated foam panels in heavy metal frame applications.
Key Features
Austenitic Bi-Metal Construction: Combines the corrosion resistance of 304/A2 or 316/A4 stainless steel body with the hardness of AISI 420 drill point, ensuring both durability and rust protection for long service life.
Hex Washer Head Design: Provides a large bearing surface for even load distribution, preventing pull-through and ensuring a secure, stable installation.
Point No.3 Drill Tip: Precision-engineered drill point enables efficient self-drilling with a maximum drilling capacity of 6mm, eliminating the need for pre-drilling holes and reducing installation time.
Double Thread Design: Optimized double thread geometry enhances grip and pull-out strength, ensuring secure fastening of insulated foam panels to steel purlins in heavy metal frame applications.
Ruspert or Dacromet Coatings: Premium anti-corrosion coatings provide extended protection against rust and environmental damage, making the screws suitable for outdoor and humid environments.
High Performance Specs: Recommended screw driver speed of MAX 2500 R.P.M. ensures optimal drilling efficiency and prevents overheating or bit damage during installation.
Common Applications
Attaching metal rails to metal purlins in construction projects
Fastening insulated foam panels to steel purlins
Heavy metal frame applications and structural installations
Metal to metal and metal to wood composite fastening
Outdoor construction projects requiring corrosion-resistant fasteners

Product Overview
Our Austenitic Bi-Metal Self Drilling Screws are specialized fasteners engineered specifically for window and door installations, particularly with reinforced pvc profiles. Featuring a rounded pan 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.
Pan Head Design: The rounded pan head provides a larger contact surface for stable installation, making it ideal for applications where a slightly raised head is acceptable, offering both strength and a clean appearance.
#2 Phillips Drive: Standard PH2 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