S-99663A327 Length 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and outdoor applications
• Enhanced torque transmission through external hex head design, preventing tool slippage during high-torque installation
• Improved load distribution with integrated flange, reducing surface pressure and preventing material deformation
• Self-tapping efficiency with thread forming design, eliminating the need for separate tapping operations in sheet metal
• Full thread engagement along the 1-1/4" length, providing maximum holding power in thin materials up to 0.025" thickness
• Precision compatibility with No. 21 drill bits (0.159" diameter), ensuring proper fit and reduced installation time
• Regulatory compliance with RoHS 3 and REACH standards, meeting international environmental and safety requirements

Professional Applications & Engineering Value

These 316 stainless steel flanged hex head tapping screws deliver exceptional value in sheet metal fabrication and industrial assembly applications. The thread forming design creates strong, permanent threads in pre-drilled holes without generating chips, making them ideal for electrical enclosures, HVAC systems, and automotive components where debris contamination must be avoided. The fully threaded configuration ensures maximum grip length in thin materials, while the external hex drive provides reliable torque transmission for high-volume production environments. The combination of marine-grade 316 stainless steel and flanged head design addresses common challenges of corrosion failure and surface damage in demanding applications, extending service life and reducing maintenance costs.

Specification Summary & Compliance

This No. 10-12 x 1-1/4" tapping screw features precision Class 2A thread tolerances with a 0.19" thread diameter and 12 threads per inch. Manufactured to tapping screw Type A/AB standards with right-hand threading and pointed tip for easy starting. The screw meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for global industrial applications. Designed specifically for use with No. 21 drill bits in materials up to 0.025" maximum drilling thickness.