S-95893A239 Length 25 mm Tapping Screws
Tapping Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 stainless steel construction, ideal for humid or demanding industrial environments
- Enhanced torque transmission and reduced cam-out thanks to the T20 Torx drive, ensuring reliable installation and longer tool life
- Strong, permanent threads in plastic materials created by the thread-forming (TRS) design, eliminating the need for separate tapping operations
- Clean, flush installation with a standard 90° flat head profile, providing a smooth finish in assembled plastic components
- Full-length threading with a 1.79mm pitch for maximum grip and holding power across the entire 25mm length
- Simplified assembly process with a pre-determined No. 30 (0.1285") drill bit size for precise pilot holes
- Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for global markets
Professional Applications & Engineering Value
These M4 TRS tapping screws are precision-engineered to solve common challenges in plastic assembly. The thread-forming action displaces material to create strong, load-bearing internal threads without generating chips, which is critical for preventing contamination and stress fractures in brittle plastics. Made from 18-8 stainless steel, they offer excellent resistance to oxidation and corrosion, making them a durable choice for electronics enclosures, automotive trim, and outdoor equipment. The combination of a T20 Torx drive and a flat head ensures high torque transfer for secure fastening and a flush finish that meets aesthetic and safety requirements in consumer and industrial products.
Specification Summary & Compliance
This M4 x 25mm screw features a fully threaded shank with an approximate thread pitch of 1.79mm and a blunt tip for controlled thread forming. It is designed for use with a No. 30 drill bit (0.1285" diameter) and a 90° countersink angle. The product is manufactured to common industrial standards for metric thread forming screws and is verified to be compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations.
