S-90055A299 Length 1" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Efficient thread forming capability with Type B design creates strong, permanent threads in sheet metal without pre-tapping
• Optimal flush installation with standard 82° flat head profile that sits perfectly countersunk in prepared holes
• Enhanced driving efficiency through Phillips No. 2 drive system that reduces cam-out and improves torque transfer
• Maximum holding power with fully threaded 1" length providing complete engagement along the entire fastener
• Precision fit assurance with recommended No. 29 drill bit (0.136") for proper hole preparation and thread formation
• Environmental compliance meeting RoHS 3 standards for restricted substance control in industrial applications

Professional Applications & Engineering Value

These zinc-plated steel tapping screws deliver exceptional performance in sheet metal assembly applications where reliable fastening is critical. The thread forming Type B design eliminates the need for separate tapping operations by cold-forming mating threads directly into the base material, creating stronger joints than cut threads while preventing chip accumulation. The Phillips flat head configuration with standard 82° countersink angle ensures flush mounting for smooth surface finishes, while the fully threaded construction provides consistent clamping force along the entire engagement length. Engineered for right-hand threading applications, these screws offer superior pull-out resistance and vibration durability in metal fabrication, HVAC systems, and industrial equipment assembly.

Specification Summary & Compliance

This No. 8-18 thread forming screw features a 0.164" thread diameter with 18 TPI (threads per inch) in a fully threaded configuration. The flat head design incorporates a standard 82° countersink angle with 0.312" head diameter and 0.1" head height. Manufactured to precise dimensional standards for consistent performance, these screws are designed for use with No. 29 drill bits (0.136" diameter) in sheet metal applications. Compliance includes RoHS 3 (2015/863/EU) regulations for environmental safety in industrial fastening solutions.