S-90190A057 Length 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in industrial environments
• Efficient thread forming technology creates strong, permanent threads in sheet metal without requiring pre-tapped holes
• Optimized drive engagement with No. 0 Phillips pan head design prevents cam-out and ensures secure fastening
• Maximum thread engagement through fully threaded design with 48 TPI precision for superior holding power
• Easy installation with pointed tip that self-starts and aligns perfectly with No. 52 drill bit specifications
• Reliable performance in sheet metal applications up to 0.025" thickness with consistent thread formation
• Environmental compliance meeting RoHS 3 standards for safe, sustainable manufacturing practices

Professional Applications & Engineering Value

These zinc-plated steel tapping screws deliver exceptional value in sheet metal fabrication and assembly operations. The thread forming A/AB type design eliminates the need for separate tapping operations, reducing installation time and labor costs while creating stronger thread engagement than cutting alternatives. The fully threaded configuration with precise 48 TPI ensures maximum contact surface area, distributing load evenly and preventing loosening under vibration. The Phillips pan head provides a low-profile finish with excellent drive torque transmission, while the zinc plating offers reliable corrosion protection for sheet metal applications in HVAC, electronics enclosures, and automotive components. The pointed tip facilitates accurate alignment and starts threads cleanly without damaging material surfaces.

Specification Summary & Compliance

These No. 1 x 1/2" tapping screws feature a 0.073" thread diameter with 48 TPI precision and standard Class 2A thread tolerances. The thread forming screws comply with A/AB tapping screw specifications and are manufactured to consistent dimensional standards. The zinc-plated steel construction meets RoHS 3 (2015/863/EU) compliance requirements, ensuring environmental responsibility while maintaining high-strength performance in sheet metal fastening applications. Installation requires a No. 52 drill bit (0.0635" diameter) for optimal thread formation in materials up to 0.025" thickness.