S-90357A138 1/4"-20 x 7/16" Alloy Steel Ultra-Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 psi ensures reliable performance in high-stress industrial applications.
• Precision Class 3A thread fit guarantees tight tolerances and secure fastening in demanding assemblies.
• Black-oxide coating on alloy steel provides superior corrosion resistance and durability in harsh environments.
• Ultra-low socket head profile allows for installation in confined spaces without compromising drive engagement.
• 1/4"-20 UNC coarse threads enable quick assembly and reduced cross-threading risks for efficient operations.
• Fully threaded design offers consistent clamping force along the entire length for uniform load distribution.
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory adherence for global supply chains.

Professional Applications & Engineering Value

Engineered for precision machinery and heavy-duty equipment, this black-oxide alloy steel socket head cap screw addresses critical challenges in industrial fastening. The ultra-low profile head and 1/4"-20 UNC coarse threads facilitate easy installation in tight spaces, minimizing assembly time while maintaining structural integrity. With a Rockwell C32 hardness and 140,000 psi tensile strength, it resists shear and vibration failures in automotive, aerospace, and manufacturing applications. The Class 3A thread fit ensures exact alignment, reducing the risk of strip-outs and enhancing the lifespan of assembled components. Ideal for high-performance fastening where reliability and compliance with international standards are paramount.

Specification Summary & Compliance

This socket head cap screw adheres to inch system measurements with a length tolerance of -0.005" to 0.005" for precise dimensional control. It features UNC coarse threads with a Class 3A fit, ensuring superior thread engagement and interchangeability. Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety requirements for industrial use. The fully threaded rod type and right-hand thread direction provide consistent performance across various applications.