S-90161A658 Length 3 3/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with blue protective coating extends service life in demanding concrete, brick, and block environments
• Enhanced torque transfer and reduced cam-out with Torx drive design for faster, more secure installations
• High load-bearing capacity with 190 lbs pull-out and 225 lbs shear strength tested in 3,000 psi concrete
• Optimized installation efficiency with pointed tip and standard flat head profile for flush mounting
• Reliable anchoring performance with 1/4" diameter and 1 5/8" thread length designed for concrete applications
• Simplified drilling preparation with compatible 3/16" drill bit and 82° countersink angle requirements
• Removable design allows for adjustments and maintenance without compromising structural integrity

Professional Applications & Engineering Value

Engineered for demanding construction and industrial applications, these blue corrosion-resistant coated steel tapping screws deliver exceptional performance in concrete, brick, and block substrates. The Torx drive system ensures maximum torque transmission during installation, preventing stripping and reducing worker fatigue while maintaining precise alignment. With 190 lbs pull-out strength and 225 lbs shear strength verified in 3,000 psi concrete testing, these screws provide reliable anchoring for structural fixtures, machinery mounting, and infrastructure projects. The combination of right-hand threading and pointed tip facilitates quick penetration and secure fastening in dense masonry materials, while the flat head design creates flush surfaces ideal for finished applications.

Specification Summary & Compliance

This 1/4" x 3 3/4" tapping screw features inch system measurements with standard thread engagement and is manufactured from high-strength steel with blue corrosion-resistant coating. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage in various industrial and construction applications. Installation requires 3/16" drill bit with 82° countersink angle and minimum 1" embedment depth for optimal performance in concrete substrates.