S-99663A225 Length 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction for extended service life in harsh environments
• Enhanced grip and stability from the flanged hex head design that prevents pull-through and distributes load evenly
• Efficient thread-forming capability creates strong, permanent threads in sheet metal without requiring pre-tapped holes
• Optimized for sheet metal applications with precise No. 29 drill bit compatibility (0.136" diameter) and 0.025" maximum drilling thickness
• Full-length threading provides maximum holding power along the entire 1-1/4" length for secure fastening
• Dual-drive versatility with external hex/slotted head for flexible installation using various tools
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe, regulated use

Professional Applications & Engineering Value

Engineered specifically for sheet metal applications, these 316 stainless steel tapping screws deliver exceptional performance in demanding industrial environments. The thread forming design eliminates the need for separate tapping operations, creating strong, vibration-resistant threads that won't loosen under stress. The flanged hex head provides superior clamping force and prevents material deformation, while the fully threaded configuration ensures maximum engagement in thin materials. With 15 TPI right-hand threads and compatibility with standard No. 29 drill bits, these screws streamline installation processes in HVAC systems, electronic enclosures, and metal fabrication projects where corrosion resistance and reliable fastening are critical.

Specification Summary & Compliance

This No. 8 size tapping screw features a 1-1/4" length with 15 TPI fully threaded design and Class 2A thread tolerances. The external hex/slotted drive style accommodates standard installation tools, while the 0.164" thread diameter and pointed tip facilitate easy insertion. Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial applications. The thread forming tapping method (Type A/AB) meets industry standards for creating durable, reliable threads in sheet metal substrates.