S-92949A078 2-56 x 5/16" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish, ideal for harsh environments.
• High tensile strength of 70,000 psi ensures reliable fastening under heavy loads and vibration.
• Precise Class 3A thread fit guarantees secure, tight connections with minimal risk of loosening.
• Hex drive compatibility (0.050") allows for easy installation and removal with standard tools.
• Fully threaded design provides maximum grip and uniform stress distribution along the entire length.
• Rounded (button) head style offers a low-profile, aesthetically pleasing finish while reducing snagging.
• Compliance with ASME B18.3, RoHS 3, and REACH ensures product safety and regulatory adherence for industrial use.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 2-56 UNC Rounded Head Screws address common challenges like corrosion, mechanical stress, and assembly efficiency. The 18-8 Stainless Steel material, enhanced by a passivated finish, resists rust and chemical exposure, extending service life in electronics, machinery, and outdoor equipment. The coarse UNC thread and Class 3A fit enable quick, secure fastening in metals and plastics, reducing installation time while maintaining integrity under vibration. With a hex drive and fully threaded body, they ensure consistent clamping force, making them ideal for compact assemblies where reliability is critical. These screws deliver engineering value by minimizing maintenance and enhancing performance in precision applications.

Specification Summary & Compliance

This screw features a 2-56 UNC thread with Class 3A fit for precise dimensional accuracy and coarse spacing. It is manufactured in accordance with ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial reliability.