S-92235A521 1/4"-20 x 1 1/2" Flanged Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – With 140,000 psi tensile strength, this screw withstands high-stress applications, reducing the risk of fastener failure in demanding environments.
• Superior Hardness & Wear Resistance – Rockwell C39 hardness ensures excellent durability and resistance to deformation under load, extending service life.
• Reliable Thread Fit – Class 3A UNC coarse threads provide precise, secure fastening with minimal play, ideal for vibration-prone assemblies.
• Corrosion-Resistant Black-Oxide Finish – The alloy steel with black-oxide coating offers enhanced protection against rust and oxidation in industrial settings.
• Integrated Flange Design – The built-in flange distributes clamping force evenly, eliminating the need for separate washers and speeding up installation.
• Hex Socket Drive Compatibility – 3/16" hex drive allows for high-torque application with standard tools, ensuring tight, reliable connections.
• Compliant with Environmental Standards – Meets RoHS 3 and REACH regulations, ensuring safe use in regulated industries without compromising performance.

Professional Applications & Engineering Value

Engineered for high-performance industrial applications, this Black-Oxide Alloy Steel Socket Head Cap Screw addresses critical engineering needs where strength, precision, and corrosion resistance are paramount. The UNC coarse thread and Class 3A fit ensure rapid assembly and secure fastening in machinery, automotive, and heavy equipment, minimizing loosening under vibration. The partially threaded design with a flange provides controlled clamping force, reducing stress concentration and improving joint integrity. Ideal for use in high-tensile environments, this fastener’s Rockwell C39 hardness and 140,000 psi tensile strength make it a reliable choice for structural components, ensuring long-term operational safety and reducing maintenance frequency.

Specification Summary & Compliance

This socket head cap screw features a 1/4"-20 UNC coarse thread with Class 3A precision fit, ensuring tight tolerances and reliable engagement. Dimensions include a 1-1/2" length, 3/8" head diameter, and 9/16" flange diameter, with a 3/16" hex drive for standard tool compatibility. Manufactured from alloy steel with a black-oxide finish, it complies with RoHS 3 (2015/863/EU) under exemption 6(a) and REACH (EC 1907/2006), confirming adherence to environmental and safety standards for industrial use.