S-90417A119 Length 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior holding power in plastics with Tri-Lobe shank design that displaces material to create durable, vibration-resistant threads
• Corrosion-resistant black-oxide steel construction provides extended service life in demanding industrial environments
• Efficient thread forming technology eliminates chips and debris while creating strong mating threads in plastic materials
• Reliable Phillips No. 1 drive system ensures secure installation and reduces cam-out during assembly operations
• Full threading with 20 TPI precision delivers maximum engagement length and superior pull-out resistance
• Optimized for plastic applications with proper drill bit sizing (No. 37/0.104") for precise hole preparation
• Pan head design with standard profile provides excellent bearing surface and professional finished appearance

Professional Applications & Engineering Value

These No. 4 x 1/2" TRS tapping screws are specifically engineered for plastic fastening applications where traditional fasteners fail. The thread forming technology combined with the Tri-Lobe shank cross-section creates permanent, high-strength threads in thermoplastic materials without generating chips that could contaminate sensitive assemblies. The black-oxide steel construction provides essential corrosion protection while maintaining the mechanical strength needed for industrial environments. These thread forming screws solve common plastic assembly challenges including strip-out, vibration loosening, and material cracking, making them ideal for plastic assembly in electronics enclosures, automotive components, and consumer products where reliability is critical.

Specification Summary & Compliance

These TRS tapping screws feature a No. 4 thread diameter (0.112") with 20 threads per inch and 1/2" length, manufactured to precise dimensional standards for consistent performance. The thread forming design eliminates the need for tapped holes while creating strong mating threads in plastic materials. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and safety in industrial applications. Designed for use with No. 37 drill bit (0.104" diameter) for optimal hole preparation in plastic substrates.