S-91263A591 3/8"-16 x 1 3/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 130,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from zinc-plated alloy steel construction extends service life and maintains integrity in harsh industrial environments.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections, minimizing loosening and enhancing assembly reliability.
• Fully threaded design provides consistent holding power along the entire length, offering versatile fastening solutions for various material thicknesses.
• Standard 82° countersink angle allows for flush mounting, creating smooth, professional finishes while distributing load effectively.
• Hex drive compatibility with 7/32" tools enables quick installation and high torque application, speeding up assembly processes.
• Rockwell C39 hardness ensures excellent wear resistance and durability, maintaining thread integrity through repeated use.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these 3/8"-16 UNC flat head screws deliver outstanding performance in machinery assembly, structural frameworks, and equipment manufacturing. The zinc-plated alloy steel construction provides essential corrosion protection for outdoor installations and humid environments, while the coarse UNC thread ensures rapid installation and superior grip in various materials. The fully threaded design maximizes engagement strength, making these hex drive screws ideal for applications requiring consistent clamping force. With their 82° countersink angle, they create seamless surfaces in metal fabrication and woodworking projects, eliminating protrusions that could interfere with moving parts or create safety hazards.

Specification Summary & Compliance

These flat head screws feature precision Class 3A thread fit with 3/8"-16 UNC coarse threading and are manufactured to ASTM F835 specifications for consistent quality and performance. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. With dimensions including 1 3/4" length, 0.781" head diameter, and 7/32" hex drive size, these fasteners maintain strict dimensional accuracy for reliable integration into engineered assemblies.