S-92235A501 4-40 x 1/4" Flanged Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Class 3A thread fit provides tighter tolerances for superior fastening precision and vibration resistance, ideal for machinery and equipment assembly.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable finish, extending the screw's service life in industrial environments.
• Flanged design increases bearing surface area for improved load distribution and stability, minimizing loosening in dynamic applications.
• Fully threaded shank allows for consistent engagement along the entire length, enabling flexible installation depths and secure clamping.
• Hex socket drive (3/32") facilitates easy installation with standard tools, providing high torque transmission and reducing strip-out risks.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets global standards for hazardous substance restrictions.

Professional Applications & Engineering Value

This 4-40 UNC thread socket head cap screw is engineered to address critical fastening challenges in industrial settings. The black-oxide alloy steel construction, combined with a Rockwell C39 hardness, delivers exceptional wear resistance and durability, making it suitable for high-vibration environments like automotive assemblies, machinery frames, and precision equipment. The coarse UNC threads and Class 3A fit ensure quick installation and reliable grip in materials prone to stress, while the flange enhances stability by distributing load evenly. Ideal for applications requiring high tensile strength and corrosion protection, this screw minimizes maintenance needs and downtime in manufacturing, aerospace, and electronics sectors.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a Class 3A fit for precise dimensional accuracy, featuring a 4-40 thread size, 1/4" length, and coarse thread spacing. It complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel alloys and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial use.