S-91255A134 6-32 x 9/16" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional durability with 120,000 psi tensile strength and Rockwell C39 hardness, ensuring reliable performance in high-stress applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in harsh industrial environments.
• Precise fastening and easy installation thanks to the 5/64" hex drive and rounded button head design, reducing assembly time and tool slippage.
• High thread reliability with Class 3A fit and UNC coarse threading, providing secure, vibration-resistant connections.
• Full threading for maximum grip along the 9/16" length, distributing load evenly and enhancing joint integrity.
• Compliance with major standards including ASME B18.3 and ASTM F835, ensuring consistent quality and interchangeability.
• Environmental and safety adherence with RoHS 3 and REACH compliance, supporting sustainable and safe manufacturing practices.

Professional Applications & Engineering Value

These rounded head screws are engineered to address common industrial challenges, such as vibration loosening and corrosion in demanding settings. Made from black-oxide alloy steel, they offer enhanced protection against rust and wear, ideal for machinery, automotive, and electronics assemblies where exposure to moisture or chemicals is a concern. The UNC coarse thread and Class 3A fit ensure tight, precise fastening, minimizing the risk of thread stripping and improving overall structural stability. With a fully threaded design and hex drive, they enable quick, secure installations in tight spaces, reducing downtime and maintenance costs. This combination of high tensile strength and standardized dimensions makes them a trusted choice for engineers seeking durability and efficiency in heavy-duty fastening applications.

Specification Summary & Compliance

This screw features precise dimensions, including a 6-32 UNC thread size with Class 3A thread fit for tight tolerances and reliable engagement. It adheres to ASME B18.3 and ASTM F835 specifications, ensuring consistent manufacturing quality. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental standards for global industrial use.