S-91255A072 2-56 x 5/32" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Black-oxide coating on alloy steel provides enhanced corrosion resistance and a durable, wear-resistant finish for extended service life.
• Class 3A thread fit offers superior precision and tighter tolerances, ensuring secure, vibration-resistant connections in critical assemblies.
• Fully threaded coarse spacing (UNC) allows for faster installation and improved grip in a variety of materials, speeding up production cycles.
• Hex drive design (0.050") enables high-torque application with common tools, minimizing slippage and simplifying maintenance.
• Rounded button head profile reduces surface protrusion for a cleaner finish and lowers the risk of snagging in confined spaces.
• Compliance with ASME B18.3, ASTM F835, RoHS 3, and REACH guarantees adherence to industry standards and environmental regulations, supporting global supply chain requirements.

Professional Applications & Engineering Value

This 2-56 UNC rounded head hex screw is engineered to address common industrial challenges, such as vibration loosening and corrosion in demanding environments. The black-oxide alloy steel construction, combined with a Class 3A thread fit and coarse thread spacing, ensures secure fastening in electronics, machinery, and automotive assemblies where precision and durability are critical. The fully threaded design and hex drive facilitate quick, reliable installations, reducing assembly time and enhancing operational efficiency. Ideal for applications requiring high-strength fasteners with consistent performance, this screw minimizes maintenance needs and supports long-term reliability in industrial screw applications.

Specification Summary & Compliance

This screw features precise Class 3A thread fit per UNC standards, with dimensions including a 0.086" thread diameter and 5/32" length. It is manufactured in accordance with ASME B18.3 and ASTM F835 specifications, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and environmentally responsible use in global markets.