S-90420A520 Length 1 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Eliminates pre-drilling requirements with integrated drilling tip that penetrates up to 0.14" thick steel and stainless steel
• Superior corrosion resistance through galvanic-barrier coated 18-8 stainless steel construction for harsh environments
• Maximum torque transmission with external hex drive design that prevents stripping during high-tension applications
• Enhanced load distribution from flanged design that reduces surface pressure and material stress
• Reliable thread formation using BSD thread forming technology that creates strong, permanent threads in base materials
• Full-length threading ensures maximum grip and holding power across the entire fastener length
• Industry-standard compatibility with No. 12-14 thread size for seamless integration into existing assemblies

Professional Applications & Engineering Value

These thread forming tapping screws deliver exceptional value in demanding sheet metal fabrication and industrial assembly applications. The specialized drilling tip eliminates costly secondary operations by penetrating up to 0.14" thick steel and stainless steel without pilot holes, significantly reducing installation time and labor costs. The galvanic-barrier coated 18-8 stainless steel construction provides critical protection against galvanic corrosion when joining dissimilar metals, while the flanged hex head design offers superior clamping force distribution. Engineered for BSD thread forming applications, these screws create stronger, more reliable threads than traditional cutting screws, making them ideal for vibration-resistant assemblies in machinery, enclosures, and structural components where joint integrity is paramount.

Specification Summary & Compliance

This No. 12-14 thread forming tapping screw features precision right-hand threads with 14 threads per inch and Class 2A thread tolerances for consistent performance. The 1-1/2" length with fully threaded design ensures maximum engagement in various material thicknesses. Manufactured to BSD screw type standards with external hex drive (0.313" across flats) and 0.415" flange diameter for secure installation. The galvanic-barrier coating on 18-8 stainless steel provides enhanced corrosion protection while maintaining compliance with industry standards for industrial fasteners used in metal fabrication applications.