S-91253A622 3/8"-16 x 3/4" 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 under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance provided by the black-oxide finish on alloy steel, extending service life in harsh industrial environments.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections, minimizing loosening in machinery and equipment.
• Hex drive design (7/32") allows for high-torque installation with standard tools, speeding up assembly and reducing labor time.
• Full threading and UNC coarse spacing enable quick engagement and strong holding power in a wide range of materials.
• 82° countersink angle and flat head profile provide a flush, low-profile finish, enhancing safety and aesthetics in assembled products.
• Compliance with ASME B18.3 and ASTM F835 ensures consistent quality and interchangeability, meeting rigorous industrial standards.

Professional Applications & Engineering Value

These 3/8"-16 UNC flat head hex drive screws are engineered to address critical challenges in industrial assembly, where vibration resistance, high tensile demands, and environmental durability are paramount. The black-oxide alloy steel construction, combined with a Rockwell C39 hardness, provides exceptional resistance to wear and corrosion, making them ideal for heavy machinery, automotive components, and structural frameworks. The fully threaded coarse spacing ensures rapid installation and robust clamping force, reducing assembly time while maintaining joint integrity. With their 82° countersink angle, they sit flush to prevent snagging and improve aerodynamic or aesthetic profiles in applications like metal fabrication, conveyor systems, and equipment enclosures. This design minimizes maintenance needs and enhances operational safety in high-stress environments.

Specification Summary & Compliance

These screws feature a Class 3A thread fit for precise tolerance, UNC coarse thread spacing, and are manufactured in accordance with ASME B18.3 and ASTM F835 specifications. They are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they are free from hazardous substances and suitable for global industrial use.