S-90161A555 Length 3 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with blue protective coating for reliable performance in demanding environments
• Superior holding power with 225 lbs shear strength and 190 lbs pull-out resistance in concrete applications
• Optimized installation efficiency featuring external hex/slotted drive for secure tool engagement and easy removal
• Proven concrete performance tested in 3,000 psi concrete with minimum 1" installation depth requirements
• Versatile material compatibility designed for use in block, brick, and concrete substrates
• Precision drilling compatibility with standard 3/16" drill bit size for accurate hole preparation
• Removable design advantage allowing for maintenance and adjustments without compromising structural integrity

Professional Applications & Engineering Value

Engineered for concrete fastening challenges, these blue corrosion-resistant coated steel tapping screws deliver exceptional performance in masonry applications. The combination of 1/4" thread diameter and 1-5/8" thread length ensures maximum engagement in block, brick, and concrete substrates. The hex head design with external drive provides superior torque transmission during installation, while the pointed tip facilitates precise starting and reduces installation time. With tested performance in 3,000 psi concrete, these screws eliminate concerns about pull-out failure in critical structural applications, making them ideal for construction projects requiring reliable, removable anchors with consistent performance.

Specification Summary & Compliance

This 1/4" x 3-1/4" tapping screw features right-hand threads with standard inch system measurements. The hex head configuration (5/16" width, 3/16" height) ensures compatibility with standard tools, while the 0.414" flange diameter provides enhanced bearing surface. Manufactured to industry standards for concrete anchors, these screws maintain dimensional accuracy and are designed for use with 3/16" drill bits (0.1875" diameter). The product meets quality specifications for steel fasteners and is suitable for professional construction applications requiring reliable performance in masonry substrates.