S-91263A117 2-56 x 3/16" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating for extended service life in harsh industrial environments
• High-strength performance with 130,000 psi tensile strength and Rockwell C39 hardness for demanding applications
• Precise Class 3A thread fit ensures reliable, vibration-resistant connections in machinery and equipment
• Efficient hex drive installation with 0.050" drive size for secure torque application and reduced tool slippage
• Optimal flush mounting with standard 82° countersink angle and flat head profile for smooth surface finishes
• Full threading coverage along the 3/16" length provides maximum grip and load distribution
• Regulatory compliance assurance meeting ASTM F835, RoHS 3, and REACH standards for global industrial use

Professional Applications & Engineering Value

Engineered for industrial fastening solutions, these 2-56 UNC flat head screws deliver critical reliability in precision assemblies. The zinc-plated alloy steel construction combats corrosion in manufacturing plants, automotive systems, and electronic enclosures, while the coarse thread spacing and right-hand thread direction enable quick installation in high-volume production lines. The fully threaded design maximizes engagement in thin materials, preventing loosening under dynamic loads. With a standard flat head profile and 82° countersink angle, they provide seamless integration where flush surfaces are essential, reducing snag risks and improving aesthetic outcomes in consumer products and industrial machinery.

Specification Summary & Compliance

This 2-56 UNC screw features precise Class 3A thread fit per inch system standards, ensuring tight tolerances for secure fastening. Manufacturing adheres to ASTM F835 specifications, with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and material integrity for global supply chains.