S-90420A595 12-24 x 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Eliminates pre-drilling requirements with integrated drilling tip that penetrates up to 0.21" thickness in steel and sheet metal
• Superior corrosion resistance through galvanic-barrier coated 18-8 stainless steel construction for extended service life
• Enhanced installation efficiency with external hex drive design providing secure tool engagement and torque transmission
• Reliable thread formation using UNC coarse threads that create strong, permanent fastenings in various materials
• Eliminates need for separate washers with integrated flange design that distributes clamping force evenly
• Full regulatory compliance meeting RoHS 3 and REACH standards for safe industrial use
• Versatile material compatibility specifically engineered for steel, stainless steel, and sheet metal applications

Professional Applications & Engineering Value

These 12-24 UNC thread forming tapping screws deliver exceptional engineering value by solving critical installation challenges in metal fabrication and assembly operations. The galvanic-barrier coated 18-8 stainless steel construction prevents galvanic corrosion when joining dissimilar metals, while the precision drilling tip eliminates costly pre-drilling operations, significantly reducing labor time and tooling requirements. The flanged hex head design provides superior bearing surface distribution, preventing material deformation in thin-gauge applications. As CSD type thread forming screws, they create stronger thread engagement than cutting taps, making them ideal for vibration-resistant connections in steel, stainless steel, and sheet metal assemblies where reliability is paramount.

Specification Summary & Compliance

These thread forming tapping screws feature UNC coarse threads with standard Class 2A tolerances, ensuring consistent thread engagement and reliable performance. The 1-1/4" length with fully threaded design provides maximum fastening capability, while the No. 4 drill tip enables penetration up to 0.21" thickness. Manufactured to industry standards for external hex drive fasteners, these screws maintain full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability for industrial applications.