S-90044A533 3/8"-24 x 2 1/4" ASME B18.3, ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in harsh industrial environments without compromising structural integrity.
• Precise Class 3A thread fit guarantees tight, secure fastening with minimal backlash, ideal for machinery requiring high vibration resistance and alignment accuracy.
• Fine UNRF thread design provides enhanced grip and load distribution, improving joint stability in components subjected to dynamic or fluctuating forces.
• Hex socket drive compatibility with a 5/16" drive allows for easy installation in confined spaces using standard tools, boosting assembly efficiency.
• Full threading along the 2-1/4" length offers versatile positioning and adjustment flexibility, accommodating various material thicknesses in complex assemblies.
• Compliance with ASME B18.3 and material standards ensures consistent quality and interoperability, supported by RoHS 3 and REACH certifications for safe, global usage.

Professional Applications & Engineering Value

Engineered for rigorous industrial settings, this black-oxide alloy steel socket head cap screw addresses common challenges like vibration loosening and corrosion-induced wear. The Class 3A UNRF fine thread enhances clamping force retention in high-precision equipment, such as CNC machinery and automotive systems, where thread integrity is critical. Its 170,000 psi tensile strength and Rockwell C37 hardness provide durability against shear and tensile stresses, making it suitable for heavy-duty applications in aerospace, manufacturing, and construction. The hex drive design facilitates quick installation in tight spaces, reducing downtime. Coupled with RoHS 3 and REACH compliance, it meets environmental and safety standards, ensuring reliability in global supply chains.

Specification Summary & Compliance

This socket head cap screw adheres to ASME B18.3 specifications with a Class 3A thread fit for precise dimensional accuracy, featuring a 3/8"-24 UNRF fine thread and full threading along the 2-1/4" length. Manufactured from ASTM A574 alloy steel, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) requirements, ensuring no hazardous substances and compliance with international regulations for industrial fasteners.