S-91263A202 3/8"-16 x 6" ASME B18.3 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated alloy steel construction for extended service life in harsh industrial environments
• Exceptional load-bearing capacity with 120,000 psi tensile strength and Rockwell C32 hardness for heavy-duty applications
• Precision thread engagement with Class 3A fit and UNC coarse threads ensuring reliable fastening in high-vibration settings
• Optimized flush mounting with standard flat head profile and 82° countersink angle for seamless surface integration
• Enhanced installation efficiency through hex drive design providing superior torque transmission and slip resistance
• Reduced material stress with partially threaded design concentrating strength where needed most
• Global compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for international project specifications

Professional Applications & Engineering Value

These 3/8"-16 UNC flat head hex drive screws deliver critical engineering solutions where surface flushness and high tensile strength are paramount. The zinc-plated alloy steel construction provides essential corrosion protection for machinery, structural assemblies, and outdoor equipment exposed to environmental elements. The partially threaded design concentrates clamping force precisely where needed, preventing thread damage in soft materials while maintaining 120,000 psi tensile strength under extreme loads. The hex drive system ensures maximum torque application without cam-out, making them ideal for automotive, construction, and heavy manufacturing applications where vibration resistance and reliable fastening are critical. Their coarse UNC threads facilitate quick assembly in production environments while maintaining Class 3A fit precision for consistent performance.

Specification Summary & Compliance

Manufactured to exacting inch system dimensions with Class 3A thread fit tolerance for precision engagement. Thread specifications conform to UNC 3/8"-16 coarse thread standards with right-hand threading orientation. Compliance includes ASME B18.3 manufacturing specifications, RoHS 3 (2015/863/EU) environmental directives, and REACH (EC 1907/2006) chemical safety standards. The partially threaded configuration maintains structural integrity while the 82° countersink angle ensures proper seating in standard chamfered holes.