S-94077A412 1/2"-13 x 4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with ultra-corrosion-resistant coated steel construction for extended service life in demanding environments
• High-strength thread forming design creates durable, permanent threads in steel and sheet metal without requiring pre-tapped holes
• External hex drive with flanged head provides excellent torque transmission and eliminates the need for separate washers
• Optimized five-lobe shank design enhances grip and prevents loosening under vibration and dynamic loads
• UNC coarse threading with 2½" minimum thread engagement ensures fast installation and superior holding power in various material thicknesses
• Comprehensive regulatory compliance meets RoHS 3 and REACH standards for global industrial applications
• 4" length with partial threading offers versatile fastening solutions for multiple sheet metal and steel assembly requirements

Professional Applications & Engineering Value

Our 1/2"-13 UNC thread forming tapping screws deliver exceptional engineering value in steel and sheet metal fabrication applications. The ultra-corrosion-resistant coated steel construction provides long-term protection against environmental degradation, significantly reducing maintenance costs and extending service intervals. The five-lobe shank cross-section combined with thread forming technology creates secure, vibration-resistant connections without the need for additional locking elements. These flanged hex head screws with external hex drive enable high-torque installation while distributing clamping force evenly across surfaces. The partial threading design with coarse UNC threads ensures rapid assembly in production environments, making them ideal for HVAC systems, metal building construction, industrial equipment manufacturing, and automotive applications where reliability and speed of installation are critical factors.

Specification Summary & Compliance

This 1/2"-13 UNC thread forming tapping screw features precise Class 2A thread tolerances with coarse thread spacing for optimal performance in steel and sheet metal applications. The screw maintains a minimum thread length of 2½" on a 4" overall length with partial threading configuration. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental compliance for industrial and construction applications worldwide. The external hex drive and flanged head design meet industry standards for high-torque fastening requirements in metalworking and fabrication sectors.