S-95844A550 Length 25 mm DIN 7982 Type C Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in humid or chemically aggressive environments.
• Efficient thread forming design creates strong, permanent threads in sheet metal without pre-drilling, reducing assembly time and labor costs.
• Maximum holding power achieved through the 80° countersink angle and fully threaded shank, preventing loosening under vibration and load.
• Streamlined installation with Phillips No. 2 drive and flat head profile, allowing for flush mounting and easy torque application with standard tools.
• Precision dimensional compliance with DIN 7982 Type C specifications, ensuring consistent performance and interchangeability in metric applications.
• Enhanced material compatibility with sheet metal up to 0.025" thickness, providing reliable fastening in automotive, HVAC, and electronic enclosures.
• Environmental regulation compliance with RoHS 3 standards, making them suitable for use in regulated industries and export markets.

Professional Applications & Engineering Value

These M4.2 x 25mm tapping screws are engineered to solve critical fastening challenges in sheet metal applications where vibration resistance, corrosion protection, and installation efficiency are paramount. The 18-8 stainless steel material provides excellent durability against oxidation and chemical exposure, while the thread forming design eliminates the need for separate tapping operations—reducing assembly steps and potential failure points. The fully threaded configuration and 80° countersink angle ensure maximum surface contact and clamping force, preventing pull-out in thin-gauge materials commonly used in electrical cabinets, machinery guards, and automotive panels. With Phillips drive compatibility, they enable rapid installation with standard industrial drivers, making them ideal for high-volume production environments requiring reliable, repeatable performance.

Specification Summary & Compliance

These screws feature metric M4.2 thread size with 25mm length and are manufactured to DIN 7982 Type C dimensional standards, ensuring precise thread form and head geometry. The flat head profile with standard dimensions (8.1mm diameter, 2.5mm height) provides consistent flush mounting. Compliance includes RoHS 3 (2015/863/EU) environmental regulations, confirming the absence of restricted hazardous substances. The thread forming tapping method and pointed tip are optimized for creating clean, secure threads in sheet metal applications without chip removal.