S-90198A579 Length 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction for long-lasting performance in harsh industrial environments
• Efficient thread forming technology creates strong, permanent threads in sheet metal without chip removal
• Complete thread engagement with fully threaded design ensures maximum holding power across the entire fastener length
• Precise flush installation with 82° countersink angle and flat head profile for smooth, professional finishes
• Reliable driving performance with No. 3 Phillips drive that resists cam-out during installation
• Optimized for sheet metal applications with pointed tip and right-hand threading for quick, secure fastening
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe industrial use

Professional Applications & Engineering Value

These 316 stainless steel tapping screws deliver exceptional value in sheet metal fabrication and industrial assembly applications. The thread forming design eliminates the need for pre-tapped holes, reducing installation time while creating stronger thread engagement through material displacement rather than removal. This approach prevents metal shavings from contaminating sensitive equipment and provides superior resistance to vibration loosening. The fully threaded configuration ensures consistent clamping force along the entire fastener length, while the 82° countersink angle allows for flush mounting in precision sheet metal work. The combination of 316 stainless steel material and Phillips flat head design makes these screws ideal for HVAC systems, electrical enclosures, and marine applications where corrosion resistance and professional appearance are critical.

Specification Summary & Compliance

These No. 12 x 1-1/4" tapping screws feature a 0.216" thread diameter with 11 threads per inch and standard inch system measurements. The thread forming (Type A/AB) tapping method follows industry standards for sheet metal fastening, requiring a 3/16" (0.1875") drill bit for proper installation. The screws maintain precise dimensional tolerances suitable for industrial applications and are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring they meet the latest safety and sustainability requirements for industrial fasteners.