S-90399A196 Length 5/8" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-phosphate steel construction for extended service life in demanding industrial environments
• Enhanced load distribution through integrated flat washer design that prevents surface damage and maintains joint integrity
• Optimal thread engagement with fully threaded #8 diameter (0.164") and 15 TPI configuration for maximum holding power in sheet metal
• Simplified installation process featuring Phillips No. 2 drive and truss head design for improved torque transmission and reduced cam-out
• Reliable thread forming capability using A/AB tapping method that creates strong, permanent threads without chip removal
• Precision compatibility with standard No. 29 drill bits (0.136" diameter) for consistent performance in materials up to 0.025" thickness
• Wide-bearing surface advantage from the truss head profile that distributes clamping force across larger areas

Professional Applications & Engineering Value

These thread forming tapping screws deliver exceptional performance in sheet metal applications where vibration resistance and permanent fastening are critical. The black-phosphate steel construction provides superior corrosion protection, making these Phillips truss head screws ideal for HVAC systems, electrical enclosures, and industrial equipment assembly. The thread forming design eliminates the need for tapping operations while creating stronger threads through material displacement rather than cutting. This results in improved fatigue resistance and reduced installation time. The integrated flat washer prevents pull-through in thin materials and maintains consistent clamping force, while the wide truss head profile offers enhanced surface contact for improved stability in dynamic loading conditions.

Specification Summary & Compliance

These No. 8 x 5/8" sheet metal screws feature precision Class 2A thread tolerances with right-hand threading and 15 threads per inch configuration. Manufactured to A/AB tapping screw standards with fully threaded pointed tip design for optimal penetration. Compatible with standard No. 29 drill bits (0.136" diameter) and engineered for maximum drilling thickness of 0.025". Constructed from high-grade steel with black-phosphate surface treatment for corrosion resistance, complying with industry standards for sheet metal fasteners and meeting RoHS and REACH environmental requirements.