S-99926A163 1/2"-13 x 1" Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction and passivated finish for extended service life in harsh environments
• Precise thread engagement with Class 3A thread fit ensuring reliable, vibration-resistant connections in critical applications
• High torque capability through 5/16" hex drive design that prevents stripping during installation
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for heavy-duty fastening requirements
• Optimal flush mounting featuring undercut flat head profile with 100° countersink angle for seamless surface integration
• Enhanced installation efficiency with coarse UNC thread spacing and partial threading for faster assembly in industrial settings
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 1/2"-13 UNC flat head screws provide critical solutions where corrosion resistance and mechanical integrity are paramount. The 18-8 stainless steel composition, enhanced by passivated finish, effectively combats chemical exposure and moisture, significantly reducing maintenance cycles in manufacturing equipment, marine hardware, and food processing machinery. The hex drive configuration delivers superior torque transmission during installation, while the Class 3A thread fit ensures precise mating with corresponding nuts and tapped holes, preventing loosening under vibration. The undercut flat head design with 100° countersink allows for completely flush mounting in precision assemblies, eliminating protrusions that could interfere with moving components or create safety hazards in automated systems.

Specification Summary & Compliance

This heavy-duty fastener maintains Class 3A thread fit per UNC standards with coarse thread spacing, ensuring precise dimensional accuracy. Manufacturing specifications include 1" length with 0.74" minimum thread engagement, 0.937" head diameter, and partial threading configuration. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting international environmental and safety standards for industrial components.