S-90390A152 1/4"-20 x 1 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior thread cutting performance with Type F design ensures reliable fastening in aluminum, brass, cast iron, and sheet metal without pre-tapped holes
• Enhanced corrosion resistance through zinc-plated steel construction extends service life in demanding industrial environments
• Secure Torx T27 drive system provides superior torque transmission and reduces cam-out risk compared to conventional drives
• Optimized 82° countersink angle with flat head design creates flush surface finishes while maintaining structural integrity
• Full threading along 1½" length delivers maximum thread engagement and holding power in various material thicknesses
• Precision UNC 1/4-20 coarse threads enable rapid installation and excellent pull-out resistance in soft metals
• Comprehensive regulatory compliance with RoHS 3 standards ensures environmental responsibility and global market acceptance

Professional Applications & Engineering Value

These 1/4-20 thread cutting screws with T27 Torx drive solve critical fastening challenges in metal fabrication and assembly operations. The zinc-plated steel construction combined with specialized thread cutting geometry eliminates the need for separate tapping operations, significantly reducing installation time and labor costs. Engineered specifically for aluminum, brass, cast iron, and sheet metal applications, these Type F tapping screws create precise mating threads while the 82° countersink angle ensures proper seating in standard countersunk holes. The blunt tip design provides better alignment during installation, minimizing cross-threading issues in production environments where speed and reliability are paramount.

Specification Summary & Compliance

Manufactured to precise dimensional standards with UNC coarse threads (1/4-20) and Class 2A thread tolerances for consistent performance. Features fully threaded design with standard flat head profile and T27 Torx drive specifications. Compliant with RoHS 3 (2015/863/EU) environmental regulations, containing no restricted hazardous substances. Designed for use with No. 1 drill bit (0.228" diameter) for proper hole preparation in specified materials.