S-90087A537 1/4"-20 x 1/2" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior material protection with zinc plating that provides excellent corrosion resistance for extended service life in demanding environments
• Exceptional thread-cutting performance with Type F design that creates precise mating threads in various materials without pre-tapping
• Wide material compatibility engineered specifically for aluminum, brass, cast iron, and sheet metal applications
• Optimized drive efficiency with Phillips No. 3 drive that ensures secure tool engagement and reduces cam-out during installation
• Reliable coarse threading with UNC 1/4"-20 profile that delivers strong holding power and rapid installation in diverse materials
• Full-length threading provides consistent fastening strength along the entire 1/2" length for maximum grip and load distribution
• Standardized pan head design offers low-profile installation with adequate bearing surface for secure fastening

Professional Applications & Engineering Value

These zinc-plated steel tapping screws deliver exceptional engineering value by solving critical fastening challenges in metal fabrication and assembly operations. The specialized thread-cutting Type F design eliminates the need for separate tapping operations, significantly reducing installation time and labor costs while ensuring precise thread formation in aluminum, brass, cast iron, and sheet metal applications. The UNC coarse threading provides superior pull-out resistance in softer materials, while the Phillips No. 3 drive system ensures reliable torque transmission without stripping. Engineered for industrial fastening requirements, these screws maintain structural integrity under vibration and load stress, making them ideal for construction, manufacturing, and metalworking environments where durability and performance are paramount.

Specification Summary & Compliance

These 1/4"-20 thread cutting screws feature precise UNC coarse threading with standard dimensional tolerances and are manufactured to exacting ASME B18.6.3 specifications SAE J933. The zinc-plated steel construction ensures consistent performance while maintaining full RoHS 3 (2015/863/EU) compliance for environmental safety. The fully threaded design with blunt tip and standard pan head profile provides reliable fastening performance across the specified material range, with recommended installation using No. 1 drill bit (0.228" diameter) for optimal thread engagement and holding strength.