S-97595A374 1/2"-13 x 1 1/2" ASME B18.3 Brass Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from high-quality brass construction, ideal for harsh industrial environments and moisture-prone applications.
• Exceptional thread reliability with Class 3A fit, ensuring precise, secure, and vibration-resistant fastening in critical assemblies.
• High mechanical strength with a 50,000 psi tensile strength and Rockwell B55 hardness for dependable performance under heavy loads.
• Efficient installation and flush finish provided by the 5/16" hex drive and standard 82° countersink angle for a smooth, professional surface.
• Wide compatibility and easy sourcing due to the standardized 1/2"-13 UNC coarse thread, a common and readily available size.
• Full-length threading for maximum grip and holding power along the entire 1-1/2" length of the screw.
• Guaranteed regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe and approved use in various industries.

Professional Applications & Engineering Value

This 1/2"-13 UNC Flat Head Brass Screw is engineered to solve common challenges in electrical, marine, and plumbing systems where corrosion is a primary concern. The brass material inherently resists rust and galvanic corrosion, making it a superior choice over steel in many environments. The Class 3A thread fit provides a tighter tolerance than commercial-grade fasteners, minimizing the risk of loosening due to vibration—a critical factor in machinery and equipment. The combination of a hex drive and flat head with an 82° countersink allows for high-torque installation and a flush finish, preventing snagging and ensuring a clean aesthetic in visible applications. Its high tensile strength ensures it can handle significant clamping forces, providing long-term reliability in heavy-duty assemblies.

Specification Summary & Compliance

This screw features a 1/2"-13 UNC coarse thread with a precision Class 3A thread fit for superior engagement. The dimensional accuracy, including head diameter and length, conforms to the ASME B18.3 standard. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and approved for use in regulated markets.