S-90344A135 6-32 x 1/2" ASTM A574 Socket Head Screws with Flat Washer

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Corrosion-resistant black-oxide coating on both the alloy steel screw and washer provides enhanced durability in harsh environments, extending service life.
• Precision Class 3A thread fit with UNC coarse threading offers superior engagement and vibration resistance, minimizing loosening over time.
• Integrated flat washer (3/8" OD) distributes load evenly, preventing surface damage and maintaining joint integrity under repeated use.
• Hex socket drive (7/64") allows for high-torque installation with standard tools, facilitating efficient assembly in confined spaces.
• Full threading along the 1/2" length enables flexible positioning and secure fastening across a wide range of material thicknesses.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency and environmental safety for global industrial supply chains.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in machinery assembly, automotive systems, and heavy equipment manufacturing. The Rockwell C39 hardness and 170,000 psi tensile strength provide exceptional resistance to shear and fatigue, making it ideal for dynamic load applications where reliability is paramount. The UNC coarse thread and Class 3A fit ensure rapid installation and secure fastening in materials prone to vibration, while the integrated flat washer eliminates the need for separate components, reducing assembly time and preventing surface indentation. Its corrosion-resistant finish and compliance with ASTM A574 standards guarantee long-term performance in demanding environments, from outdoor enclosures to precision instruments.

Specification Summary & Compliance

This fastener features a 6-32 UNC thread with Class 3A precision tolerance for consistent fit and performance. Manufactured in accordance with ASTM A574 specifications, it includes a fully threaded 1/2" length, standard socket head profile, and hex drive (7/64"). The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.