S-90161A398 Length 2 3/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with silver-coated steel construction for long-lasting performance in demanding environments
• Exceptional holding power with 170 lbs pull-out and 210 lbs shear strength for secure fastening in concrete applications
• Optimized installation efficiency with standard Phillips drive and flat head design for quick, tool-compatible driving
• Clean flush-mount finish with 82° countersink angle that sits perfectly flush with material surfaces
• Reliable concrete performance tested in 3,500 psi concrete with proven 1" minimum installation depth
• Versatile material compatibility designed for concrete, brick, and block applications with right-hand threaded engagement
• Removable design flexibility allowing for adjustments and disassembly when needed

Professional Applications & Engineering Value

These heavy-duty tapping screws solve critical fastening challenges in concrete, brick, and block applications where vibration resistance and long-term stability are paramount. The silver corrosion-resistant coating on high-strength steel provides essential protection against environmental degradation, while the pointed tip design and right-hand threads ensure rapid penetration and secure mechanical locking in base materials. Engineered specifically for 3,500 psi concrete tested conditions, these Phillips drive flat head screws deliver reliable performance in construction, infrastructure, and industrial maintenance projects where pull-out and shear forces are significant concerns. The combination of 1/4" drill bit compatibility and standardized installation parameters makes these fasteners ideal for both professional contractors and maintenance teams requiring consistent, repeatable results.

Specification Summary & Compliance

This 5/16" x 2-3/4" tapping screw features inch system measurements with Class 2A thread tolerances and standard flat head profile. The fastener meets industry standards for concrete anchor applications with specified 82° countersink angle and 1" minimum installation depth. Manufacturing complies with relevant mechanical property requirements for tapping screws in construction applications, with material composition adhering to standard corrosion-resistant coating specifications for extended service life in challenging environments.