S-91263A605 1/2"-13 x 1 1/2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated alloy steel construction, ideal for harsh industrial environments.
• Exceptional tensile strength of 130,000 psi ensures reliable performance in heavy-duty applications.
• Precise Class 3A thread fit guarantees secure, vibration-resistant fastening with minimal risk of loosening.
• Fully threaded UNC coarse design provides faster installation and enhanced grip in various materials.
• Rockwell C39 hardness offers excellent durability and resistance to wear under high-stress conditions.
• Hex drive (5/16") compatibility allows for easy installation with standard tools, reducing assembly time.
• Compliance with ASTM F835, RoHS 3, and REACH ensures safety, environmental responsibility, and consistent quality.

Professional Applications & Engineering Value

These 1/2"-13 UNC flat head screws are engineered to address common industrial challenges, such as vibration-induced loosening and corrosion in demanding environments. The zinc-plated alloy steel material provides a protective barrier against moisture and chemicals, extending service life in applications like machinery assembly, structural frameworks, and automotive components. With a coarse thread and Class 3A fit, they deliver superior holding power in soft or brittle materials, reducing the need for frequent maintenance. The 82° countersink angle ensures a flush finish, minimizing protrusions for safer, streamlined designs. Ideal for heavy-duty fastening where high tensile strength and compliance with standards like ASTM F835 are critical, these screws offer reliability in construction, manufacturing, and repair sectors.

Specification Summary & Compliance

These screws feature precise Class 3A thread fit per UNC standards, with dimensions including a 1/2"-13 thread size, 1 1/2" length, and 82° countersink angle. Manufactured to meet ASTM F835 specifications, they ensure consistent performance and durability. Additionally, they are compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), supporting environmental safety and regulatory adherence in industrial use.