S-91253A972 1-64 x 1/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional durability with Rockwell C39 hardness and 130,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance provided by the black-oxide finish on alloy steel, extending service life in industrial environments
• Precise installation and removal with hex drive compatibility (0.050") ensuring secure tool engagement and reduced stripping risk
• Optimal flush mounting through the 82° countersink angle and standard flat head profile for clean, professional finishes
• Enhanced thread engagement with Class 3A thread fit and coarse spacing (1-64 UNC) for secure fastening in various materials
• Maximum holding power from the fully threaded design, providing consistent grip along the entire 1/4" length
• Regulatory compliance assurance meeting ASTM F835, RoHS 3, and REACH standards for quality and environmental safety

Professional Applications & Engineering Value

These high-strength flat head screws deliver exceptional engineering value across industrial applications where reliability and precision are paramount. The black-oxide alloy steel construction provides superior corrosion resistance while maintaining the 130,000 psi tensile strength necessary for heavy-duty fastening requirements. The 1-64 UNC coarse thread with Class 3A fit ensures rapid installation and secure holding in metals, plastics, and composite materials. The 82° countersink angle and standard flat head profile create seamless flush mounting in precision assemblies, while the hex drive compatibility prevents cam-out during high-torque applications. Ideal for machinery, equipment manufacturing, and electronic enclosures where vibration resistance and long-term performance are critical.

Specification Summary & Compliance

This 1-64 UNC flat head screw features precision Class 3A thread fit with coarse thread spacing and right-hand threading. Manufactured to exact dimensional standards including 1/4" length, 0.168" head diameter, and fully threaded design. Compliant with ASTM F835 specifications for mechanical properties and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring both performance reliability and regulatory adherence for industrial applications.