S-91263A148 10-24 x 1 1/4" ASME B18.3 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from zinc plating protects against rust and environmental degradation, extending service life in harsh industrial environments.
• Precision Class 3A thread fit guarantees tight, secure fastening with minimal play, enhancing joint integrity and vibration resistance.
• Full threading along the 1-1/4" length provides maximum grip and holding power across the entire engagement area.
• 82° countersink angle and flat head design allows for a flush, clean finish when installed, preventing snagging and improving safety.
• Hex drive (1/8") compatibility enables easy installation and removal with standard tools, reducing assembly time and labor costs.
• High hardness (Rockwell C32) maintains thread form and drive integrity during repeated use, ensuring long-term reliability.

Professional Applications & Engineering Value

These 10-24 UNC flat head screws are engineered from zinc-plated alloy steel to address critical challenges in industrial assembly, such as vibration loosening and corrosion-induced failure. The coarse thread spacing and Class 3A thread fit provide superior resistance to back-out under dynamic loads, making them ideal for machinery, automotive, and structural applications where reliability is paramount. The fully threaded design ensures consistent clamping force across the entire length, while the 82° countersink allows seamless integration into angled surfaces without protrusion. This combination of material strength and precise engineering delivers a durable, maintenance-free fastening solution that withstands harsh operating conditions.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 specifications, these screws guarantee dimensional accuracy with a Class 3A thread fit and UNC coarse thread profile. They are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they meet stringent environmental and safety standards for industrial use worldwide.