S-90044A126 1/4"-20 x 2 1/4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior tensile strength of 170,000 psi ensures reliable performance under extreme loads, reducing the risk of fastener failure in critical applications.
• Exceptional hardness (Rockwell C37) provides excellent wear resistance and maintains thread integrity through repeated assembly cycles.
• Precision Class 3A thread fit delivers tighter tolerances for secure fastening with minimal backlash in high-vibration environments.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance while maintaining dimensional stability in harsh operating conditions.
• Standard hex socket drive allows for high torque application with common tools, preventing stripping and enabling efficient installation in confined spaces.
• Coarse UNRC threading enables rapid assembly and superior holding power in a wide range of materials including metals and plastics.
• Full threading along the 2-1/4" length provides maximum adjustability and clamping force distribution across the entire fastener.

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these socket head cap screws solve critical fastening challenges where vibration resistance and structural integrity are paramount. The black-oxide alloy steel construction combined with Class 3A UNRC coarse threads ensures reliable performance in machinery assembly, automotive components, and heavy equipment where loosening under dynamic loads can cause catastrophic failures. The high tensile strength and Rockwell C37 hardness make these fasteners ideal for high-stress applications including robotic systems, precision tooling, and industrial automation where dimensional stability and repeated disassembly are routine requirements. The 3/16" hex drive design facilitates secure tool engagement even in confined spaces, while the fully threaded configuration allows for precise adjustment and uniform clamping pressure across joined components.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit precision and UNRC coarse thread specifications. These socket head cap screws comply with ASTM A574 manufacturing requirements for high-strength alloy steel fasteners. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe use in regulated industries and international markets.