DIN 7981 ST 5.5 A4 Stainless Steel 316 Pan Head Phillips Drive Self Tapping Screws Cross Recessed ISO 7049

Description

DIN 7981 ST 5.5 A4 phillips drive pan head self-tapping screws are a popular choice for applications requiring quick, reliable, and easy fastening in various materials. Known for their rounded, raised head and self-tapping capability, these screws provide practical benefits across numerous projects and industries. Ever Hardware also provides custom-made fasteners & other precision components.

1. Self-Tapping Capability for Quick Installation: Self-tapping screws create their own threads as they are driven into materials, eliminating the need for pre-drilling in many cases. This feature makes them ideal for use in sheet metal, plastics, and wood, as it saves time and simplifies the installation process, especially in high-volume or repetitive applications.
2. Phillips Drive for Controlled Torque Application: The Phillips drive allows for controlled torque application, making it easy to install these screws with either hand tools or power drivers. The Phillips drive design centers the screwdriver automatically, making it easier to apply balanced torque without slipping out of the head. This is especially helpful in high-speed assembly lines or for installers working in confined spaces.
3. Pan Head Design for Secure, Aesthetic Finish: The pan head has a rounded, slightly raised profile with a flat bearing surface, providing a secure, flush hold without countersinking. This design creates a clean, professional appearance and is ideal for applications where the screw head is visible, such as appliance assembly, cabinetry, and electronics enclosures. The pan head also provides a large surface area, which improves the screw’s ability to hold down materials firmly without damaging the surface.
4. Versatility Across Various Materials: Phillips drive pan head self-tapping screws are compatible with a variety of materials, including thin metal sheets, plastic, wood, and composite materials. Their ability to form their own threads makes them extremely versatile and suitable for home improvement, automotive, industrial, and construction applications where different materials might be used.
5. Corrosion Resistance in Stainless Steel Versions: Stainless steel 316 screws offer numerous benefits, particularly in applications that demand high corrosion resistance, strength, and durability. The primary advantage comes from the 316-grade stainless steel, which contains molybdenum, providing superior resistance to corrosion, especially in harsh environments such as marine, chemical, and industrial settings. This makes 316 stainless steel screws ideal for use in environments exposed to saltwater, chlorides, and chemicals, where standard steel or other materials might fail due to rust or degradation.
6. Reduced Risk of Over-Tightening: The Phillips drive is designed to prevent over-tightening by allowing the driver to “cam out” if too much torque is applied. While this can sometimes lead to stripping if not careful, it serves as a safeguard for applications that might otherwise suffer from weakened materials due to over-torquing.

In summary, DIN 7981 ST 5.5 A4 Phillips drive pan head self-tapping screws offer convenient installation, versatile material compatibility, and a secure, aesthetic finish. Their self-tapping ability and robust design make them a reliable choice for projects requiring efficient, durable fastening solutions across various materials, especially where appearance, ease of use, and corrosion resistance (in stainless versions) are important.

DIN 7981 Self-Tapping Screws Size Specification: