S-92949A076 2-56 x 3/16" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh environments
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing
• Precise thread engagement with Class 3A fit and UNC coarse threads ensuring vibration resistance and secure fastening
• Efficient installation via 0.050" hex drive, providing positive torque transmission and reduced tool slippage
• Full threading coverage along the 3/16" length for maximum grip and uniform stress distribution
• Regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe, global industrial use
• Compact rounded head design offering a low-profile finish that minimizes snagging in confined spaces

Professional Applications & Engineering Value

These 2-56 UNC rounded head hex drive screws are precision-engineered to address critical assembly challenges in electronics, aerospace, and medical equipment. The 18-8 stainless steel material, enhanced by a passivated finish, resists oxidation and chemical exposure, extending service life in humid or corrosive settings. With a Class 3A thread fit and coarse thread spacing, the fastener maintains clamp force under dynamic loads, reducing loosening in high-vibration applications. The hex drive design allows for high-torque installation with standard tools, speeding up production while the fully threaded body ensures consistent holding power across the entire engagement length.

Specification Summary & Compliance

This screw adheres to ASME B18.3 dimensional standards with a Class 3A thread fit for precise tolerances. The UNC coarse thread (2-56 size) and right-hand thread direction are manufactured to industrial specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability.