S-97646A315 1/4"-28 x 1" 18-8 Stainless Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable load-bearing performance
• Secure anti-loosening performance through integrated serrations that prevent rotation under vibration
• Enhanced stability and distribution thanks to the flanged design that eliminates the need for separate washers
• Precise thread engagement with Class 2A fine UNF threads ensuring accurate fit and reduced cross-threading risks
• Efficient installation and removal using standard external hex drive tools for quick maintenance access
• Full regulatory compliance meeting RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This 1/4"-28 UNF hex head screw delivers critical performance in demanding applications where vibration resistance and material integrity are paramount. The 18-8 stainless steel composition provides excellent corrosion resistance for outdoor equipment, marine components, and chemical processing installations. The combination of fully threaded design and Class 2A thread fit ensures maximum engagement strength while maintaining precise assembly tolerances. The integrated flange with serrations creates a permanent locking mechanism that eliminates loosening in high-vibration machinery, automotive assemblies, and electrical enclosures. With 100,000 psi tensile strength, this fastener reliably secures critical joints in structural frameworks, manufacturing equipment, and transportation systems where failure is not an option.

Specification Summary & Compliance

This flanged hex head screw features precise Class 2A thread fit according to UNF standards with fine thread spacing for optimal clamping force. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability. The external hex drive configuration provides standard tool compatibility while the right-hand thread direction follows conventional installation practices. Dimensional specifications include 1" length, 3/8" head width, and 9/16" flange diameter for consistent performance across industrial applications.