S-91306A248 2-56 x 3/8" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, ideal for harsh industrial environments and extending service life.
• Exceptional tensile strength of 120,000 psi ensures reliable, high-load fastening without failure.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies.
• Coarse UNC threads enable faster installation and reduced risk of cross-threading in various materials.
• Fully threaded design offers maximum grip and holding power along the entire screw length.
• Hex drive (0.050") allows for high-torque application with standard tools, minimizing slippage.
• Compliant with major standards including ASME B18.3 and ASTM F835, ensuring consistent quality and performance.

Professional Applications & Engineering Value

These 2-56 UNC thread screws are engineered from zinc-plated alloy steel to address critical industrial challenges such as corrosion, vibration loosening, and high-stress fatigue. The rounded button head provides a low-profile, finished appearance while reducing the risk of snagging. With a Rockwell C39 hardness and coarse threading, they deliver robust performance in metal assemblies, electronics, and machinery where reliable fastening and environmental durability are paramount. The fully threaded and Class 3A fit ensures uniform load distribution and resistance to dynamic forces, making them a trusted choice for demanding industrial applications.

Specification Summary & Compliance

This product features a 2-56 UNC coarse thread with a precise Class 3A thread fit for superior dimensional accuracy. Manufactured in compliance with ASME B18.3 and ASTM F835 standards, it also meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in global supply chains.