S-91255A709 1/2"-13 x 1 1/8" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, ideal for harsh industrial environments.
• Superior tensile strength of 120,000 psi ensures reliable performance in high-stress applications.
• Precise Class 3A thread fit provides secure, vibration-resistant fastening and reduces assembly issues.
• High durability from Rockwell C39 hardness, maintaining integrity under repeated use.
• Easy installation and removal with a 5/16" hex drive, minimizing tool slippage and speeding up workflows.
• Full threading offers consistent grip along the entire length for uniform load distribution.
• Compliance with major standards including ASME B18.3 and ASTM F835, ensuring quality and safety.

Professional Applications & Engineering Value

These 1/2"-13 UNC hex drive screws are engineered to address critical challenges in industrial assembly, such as vibration loosening and material fatigue. Made from black-oxide alloy steel, they provide excellent resistance to rust and wear, extending service life in demanding settings like machinery, automotive, and construction. The coarse thread and Class 3A fit ensure quick, secure fastening even in materials prone to stripping, while the rounded head design reduces surface damage and improves aesthetics. Ideal for heavy-duty applications, these screws deliver reliable performance where high tensile strength and compliance with ASME B18.3 are paramount, minimizing downtime and maintenance costs.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including Class 3A thread fit for tight tolerances and UNC coarse threading for robust engagement. It meets ASME B18.3 and ASTM F835 specifications, ensuring consistent quality and performance. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and safety standards in global supply chains.