S-91255A796 5/8"-11 x 1 1/4" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional durability with Black-Oxide Alloy Steel construction providing superior corrosion resistance and long service life
• Maximum torque transmission through the 3/8" hex drive design, ensuring secure installation and removal in demanding applications
• Superior thread engagement with Class 3A fit and UNC coarse threading for reliable fastening in high-vibration environments
• High-strength performance delivering 120,000 psi tensile strength and Rockwell C37 hardness for heavy-duty applications
• Easy installation access with rounded button head profile that fits in confined spaces while providing a finished appearance
• Full-threaded design ensures consistent holding power along the entire 1-1/4" length for maximum grip strength
• Regulatory compliance meeting industry standards for safety and environmental requirements

Professional Applications & Engineering Value

These 5/8"-11 UNC rounded head screws deliver exceptional engineering value in demanding industrial environments where vibration resistance and structural integrity are critical. The Black-Oxide Alloy Steel construction provides enhanced corrosion protection while maintaining the 120,000 psi tensile strength necessary for heavy machinery, structural frameworks, and equipment assembly. The 3/8" hex drive ensures positive torque application without cam-out, while the Class 3A thread fit maintains precise tolerances in high-stress applications. The rounded button head design offers both functional clearance and professional aesthetics, making these fully threaded screws ideal for construction equipment, industrial machinery, and automotive applications where reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit and UNC coarse threading for superior engagement. These rounded head hex drive screws comply with ASME B18.3 dimensional specifications and ASTM F835 performance requirements. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring they meet current regulatory requirements for industrial use worldwide.