S-92949A081 2-56 x 1/2" 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 industrial environments.
• High tensile strength of 70,000 psi ensures reliable, long-lasting fastening under demanding loads.
• Precise Class 3A thread fit provides secure engagement and reduces the risk of loosening in vibration-prone applications.
• Hex drive design (0.050") allows for easy installation and removal with standard tools, minimizing assembly time.
• Rounded button head profile offers a low-profile, aesthetically pleasing finish while reducing snagging risks.
• Full compliance with ASME B18.3, RoHS 3, and REACH guarantees adherence to industry standards and environmental regulations.
• Coarse UNC threading (2-56) enables quick assembly and strong holding power in various materials.

Professional Applications & Engineering Value

Engineered for precision and durability, these 2-56 UNC thread rounded head screws are crafted from 18-8 stainless steel with a passivated finish to combat corrosion in demanding settings like machinery, electronics, and outdoor equipment. The hex drive ensures efficient torque application, reducing installation errors, while the Class 3A thread fit and coarse thread spacing enhance grip in softer substrates or high-vibration environments. With a Rockwell B55 hardness and 70,000 psi tensile strength, they address common failures from stress and wear, making them a trusted choice for industrial fasteners requiring consistent performance and regulatory compliance.

Specification Summary & Compliance

This screw adheres to ASME B18.3 specifications, with precise dimensions including a 1/2" length, UNC 2-56 thread size, and Class 3A thread fit for tight tolerances. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring environmental safety and suitability for global industrial applications.