S-90429A162 3/8"-24 x 5 1/2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 130,000 psi ensures reliable performance in high-stress applications and prevents fastener failure.
• Superior wear resistance from Rockwell C39 hardness extends service life and reduces maintenance needs in demanding environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies and improved joint integrity.
• Partially threaded design allows for controlled clamping force and is ideal for applications where unthreaded shank strength is critical.
• 82° countersink angle with a standard flat head profile enables a flush finish, enhancing safety and aesthetics in assembled products.
• Hex drive (7/32") offers high torque capability and easy installation with standard tools, reducing assembly time.
• Compliance with ASTM F835, RoHS 3, and REACH guarantees material quality and environmental safety for global industrial use.

Professional Applications & Engineering Value

This 3/8"-24 UNF flat head screw is engineered from alloy steel to address critical challenges in heavy machinery, automotive, and structural frameworks. Its fine threading and Class 3A fit minimize loosening under dynamic loads, providing vibration resistance where precision is paramount. The partially threaded shank concentrates strength in the grip area, preventing shear failure in high-load joints. With a 130,000 psi tensile strength and Rockwell C39 hardness, it withstands extreme forces and abrasive conditions, reducing replacement frequency. The 82° countersink ensures a seamless fit in pre-drilled holes, ideal for applications requiring aerodynamic or safety-compliant surfaces. This hex drive screw simplifies installation in confined spaces, making it a versatile choice for industrial fastening solutions that demand durability and regulatory compliance.

Specification Summary & Compliance

This screw adheres to inch system dimensions with a 3/8"-24 UNF fine thread and Class 3A thread fit for high precision. It meets ASTM F835 specifications for mechanical properties and is manufactured to ensure RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming it is free from hazardous substances. The partially threaded design and 5 1/2" length provide consistent performance in standardized applications.