S-91306A246 2-56 x 3/16" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional durability with zinc-plated alloy steel construction, providing reliable corrosion resistance for long-term industrial use.
• Superior fastening performance due to Class 3A thread fit and coarse spacing, ensuring tight, secure connections in demanding applications.
• High tensile strength of 120,000 psi and Rockwell C39 hardness, offering robust load-bearing capacity and resistance to deformation.
• Easy installation and removal with a 0.050" hex drive and rounded button head design, reducing tool slippage and assembly time.
• Full threading along the 3/16" length for maximum grip and uniform stress distribution, minimizing the risk of loosening under vibration.
• Compliance with industry standards including ASME B18.3 and ASTM F835, guaranteeing consistent quality and interchangeability.
• Environmental and safety assurance through RoHS 3 and REACH compliance, making them suitable for regulated industries.

Professional Applications & Engineering Value

These 2-56 UNC rounded head screws are engineered to address common industrial challenges, such as vibration-induced loosening and corrosion in harsh environments. Made from zinc-plated alloy steel, they provide a protective barrier against moisture and chemicals, extending service life in applications like electronics enclosures, machinery assemblies, and automotive components. The coarse UNC thread and Class 3A fit ensure quick, precise engagement with mating parts, reducing installation errors and enhancing structural integrity. Ideal for high-stress environments, their fully threaded design distributes loads evenly, preventing joint failure and maintenance downtime. By integrating these industrial fasteners, engineers achieve reliable, repeatable performance in critical assemblies.

Specification Summary & Compliance

This product features precise Class 3A thread fit with UNC coarse spacing, ensuring tight tolerances for secure fastening. Dimensions include a 3/16" length, 0.086" thread diameter, and 0.050" hex drive for consistent compatibility. Manufacturing adheres to ASME B18.3 and ASTM F835 specifications, guaranteeing uniformity and reliability. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances for safe use in global markets.