S-99795A161 Length 4" Tapping Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-plated 410 stainless steel construction for long-term reliability in harsh environments
• Superior load-bearing capacity with 1000 lbs pull-out and 1800 lbs shear strength for secure heavy-duty fastening
• Optimized installation efficiency featuring external hex drive and 3/4" hex head for easy torque application with standard tools
• Proven concrete performance tested in 4000 psi concrete to ensure consistent holding power in block, brick, and masonry
• Removable design flexibility allowing for adjustments and reinstallation without compromising structural integrity
• Precise drilling compatibility with standardized 7/16" drill bit size for clean, accurate installations every time
• Full 4" length engagement providing maximum thread contact and stability in dense concrete substrates

Professional Applications & Engineering Value

Engineered specifically for demanding masonry applications, this heavy-duty tapping screw solves critical installation challenges in concrete, block, and brick substrates. The zinc-plated 410 stainless steel construction delivers superior corrosion protection while maintaining the mechanical strength needed for structural fastening. The external hex drive and substantial 3/4" hex head design enable high-torque installation without stripping, significantly reducing installation time and labor costs. With verified performance in 4000 psi concrete, this removable screw provides engineers and contractors with reliable, adjustable anchoring solutions for HVAC systems, structural framing, and industrial equipment mounting where vibration resistance and long-term durability are paramount.

Specification Summary & Compliance

This 1/2" tapping screw features right-hand threads with Class 2A thread tolerances and blunt tip design for optimal performance in masonry materials. The 3 3/4" thread length on the 4" overall length ensures maximum engagement, while the specified 7/16" drill bit diameter (0.4375") provides precise hole preparation. Manufactured to meet industry standards for concrete anchors and tapping screws, this product complies with relevant mechanical performance specifications and environmental regulations including RoHS and REACH requirements.