S-99926A165 1/2"-13 x 1 1/2" 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
• Exceptional thread reliability with Class 3A fit ensuring precise engagement and vibration resistance in critical applications
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for demanding load-bearing requirements
• Optimized flush mounting featuring 100° countersink angle and undercut flat head profile for seamless surface integration
• Enhanced installation efficiency with 5/16" hex drive enabling high-torque application and quick assembly
• Reliable coarse threading using 1/2"-13 UNC pattern for superior grip in soft materials and rapid installation
• Environmental compliance assurance meeting RoHS 3 and REACH standards for global manufacturing applications

Professional Applications & Engineering Value

These 18-8 stainless steel flat head screws deliver critical performance advantages for industrial applications where corrosion resistance and mechanical reliability are paramount. The passivated finish significantly enhances surface protection against chemical exposure and oxidation, while the Class 3A thread fit ensures precise tolerance control for vibration-prone assemblies. The unique combination of 70,000 psi tensile strength and Rockwell B70 hardness provides exceptional load distribution in machinery, automotive, and structural applications. The undercut flat head design with 100° countersink angle allows for perfect flush mounting in precision equipment, preventing surface protrusion while maintaining maximum clamping force. These partially threaded fasteners offer optimized grip length control for specific joint requirements.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 3A thread fit per UNC specifications, ensuring consistent threading quality and interchangeability. The 1/2"-13 UNC coarse thread pattern provides optimal performance in various materials. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making these screws suitable for global industrial applications. The 18-8 stainless steel composition combined with passivated surface treatment delivers superior corrosion resistance while maintaining mechanical properties.