S-91253A462 10-24 x 3 1/2" ASME B18.3 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 130,000 psi ensures reliable performance under heavy loads and vibration
• Black-oxide coating on alloy steel provides superior corrosion resistance for extended service life in demanding environments
• Class 3A thread fit delivers precision engagement and consistent clamping force in critical applications
• 82° countersink angle with standard flat head profile enables flush mounting and clean aesthetic finishes
• Hex drive design allows for high-torque installation and secure fastening in confined spaces
• Partially threaded shank provides optimal grip length control while reducing material costs
• Coarse UNC threading ensures quick assembly and superior resistance to vibration loosening

Professional Applications & Engineering Value

Engineered for industrial applications requiring reliable fastening solutions, these 10-24 UNC flat head screws address critical engineering challenges in machinery assembly, structural frameworks, and equipment manufacturing. The black-oxide alloy steel construction combined with Rockwell C39 hardness provides exceptional durability against wear and environmental factors. The 82° countersink angle ensures seamless surface integration while the hex drive facilitates secure installation in high-vibration environments. These partially threaded screws offer precise clamping control for applications where over-tightening must be prevented, making them ideal for precision fasteners in automotive, aerospace, and heavy equipment sectors.

Specification Summary & Compliance

This 3 1/2" flat head screw features Class 3A thread fit per UNC standards with coarse threading for optimal engagement. Manufactured to meet ASME B18.3 and ASTM F835 specifications, ensuring dimensional accuracy and performance reliability. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe industrial use worldwide.