S-91306A245 2-56 x 1/8" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 PSI ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
• Zinc-plated alloy steel construction provides excellent corrosion resistance, extending service life in demanding industrial environments.
• Class 3A thread fit guarantees precise, tight-tolerance threading for secure, vibration-resistant assemblies.
• Hex drive design (0.050") allows for easy installation and removal with standard tools, minimizing assembly time.
• Fully threaded coarse (UNC) design ensures maximum grip and holding power across the entire fastener length.
• Rounded button head profile offers a low-profile, aesthetically pleasing finish while reducing snagging risks.
• Compliance with ASME, ASTM, RoHS, and REACH standards ensures product reliability and environmental safety for global supply chains.

Professional Applications & Engineering Value

These 2-56 UNC rounded head screws are engineered for precision fastening in industrial applications where space constraints and vibration resistance are critical. The zinc-plated alloy steel material combats corrosion in harsh environments, while the Class 3A thread fit and coarse thread spacing provide superior clamping force and prevent loosening under dynamic loads. The hex drive design ensures efficient torque transmission, reducing installation errors. Ideal for electronics, machinery, and automotive assemblies, these fully threaded screws deliver consistent performance and durability, meeting rigorous engineering demands.

Specification Summary & Compliance

This product adheres to Class 3A thread fit tolerances per UNC standards, ensuring precise dimensional accuracy. Manufacturing complies with ASME B18.3 and ASTM F835 specifications. Environmental and safety regulations met include RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming suitability for global markets.