S-90161A531 Length 3 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Exceptional holding power with 150 lbs pull-out and 180 lbs shear strength for secure, reliable fastening in demanding concrete applications.
• Superior corrosion resistance provided by the blue protective coating, extending the screw's service life in harsh environments.
• Efficient installation thanks to the pointed tip and external hex/slotted drive, allowing for quick and easy driving into block, brick, and concrete.
• Optimized thread design with a 1-5/8" thread length and right-hand direction for maximum grip and load distribution in the base material.
• Removable and reusable anchor design, offering flexibility for adjustments or disassembly without compromising the installation site.
• Proven performance tested in 3,000 psi concrete, ensuring dependable performance in high-strength construction materials.
• Clear installation guidance with specified 5/32" drill bit size and 1" minimum depth for precise and correct application every time.

Professional Applications & Engineering Value

Engineered for heavy-duty fastening, this blue corrosion-resistant steel tapping screw solves critical challenges in masonry and concrete work. Its pointed tip and aggressive threading eliminate the need for pre-tapping, reducing installation time and labor costs. The external hex/slotted drive provides superior torque transmission, preventing cam-out and ensuring a tight, secure fit. Designed specifically for use in block, brick, and concrete, it delivers reliable performance where vibration and load stresses are common, making it an indispensable concrete anchor for construction, HVAC, and electrical fixture installations. The high pull-out and shear strength directly address the need for long-term, vibration-resistant fastening in commercial and industrial settings.

Specification Summary & Compliance

This 3/16" tapping screw features inch system measurements, a thread diameter of 0.188", and a total length of 3-1/4". It is manufactured to standard tapping screw specifications with a right-hand thread direction. The product is designed for use with a 5/32" (0.1563" diameter) drill bit and requires a minimum installation depth of 1". Compliant with industry standards for heavy-duty mechanical anchors tested in 3,000 psi concrete.