S-91251A746 2-64 x 3/16" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments.
• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing failure risks.
• Precision Class 3A fine threads provide tighter tolerances for secure, vibration-resistant fastening in critical assemblies.
• Fully threaded design allows for consistent engagement and adjustable clamping force along the entire length.
• Rockwell C37 hardness offers excellent wear resistance, maintaining thread integrity through repeated use.
• Compact 5/64" hex drive and standard socket head enable easy installation in confined spaces with standard tools.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency and environmental safety for global supply chains.

Professional Applications & Engineering Value

This 2-64 UNF socket head cap screw is engineered to address common industrial challenges such as vibration loosening and material fatigue. The black-oxide alloy steel construction provides a durable barrier against rust and oxidation, ideal for machinery, automotive, and electronics where moisture or chemicals are present. With fine threads and a Class 3A thread fit, it ensures precise alignment and minimal backlash in high-precision assemblies. The fully threaded right-hand design allows for uniform load distribution, enhancing joint integrity in applications requiring repeated disassembly. Its 170,000 psi tensile strength and Rockwell C37 hardness make it suitable for heavy-duty fastening, reducing maintenance downtime and improving operational reliability.

Specification Summary & Compliance

This screw adheres to Class 3A thread tolerances for inch-system UNF fine threads, ensuring dimensional accuracy and interchangeability. Manufactured in compliance with ASTM A574 specifications, it meets rigorous quality standards for socket head cap screws. The product is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, confirming the absence of restricted substances and supporting sustainable procurement practices.