S-97595A588 5/8"-11 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 outdoor applications.
• Exceptional thread reliability with Class 3A fit, ensuring precise, secure, and vibration-resistant connections.
• High mechanical strength with a 50,000 psi tensile strength and Rockwell B55 hardness for demanding, heavy-duty applications.
• Efficient installation and removal facilitated by the 3/8" hex drive and standard 82° countersink angle for a flush, professional finish.
• Optimized for coarse threading (UNC) providing faster assembly and superior performance in softer materials or where frequent disassembly is required.
• Full regulatory compliance with ASME B18.3, RoHS 3, and REACH, guaranteeing safety, quality, and environmental responsibility.
• Versatile fully threaded design offering consistent holding power along the entire 1-1/2" length for maximum fastening integrity.

Professional Applications & Engineering Value

This 5/8"-11 UNC brass flat head screw is engineered to solve critical challenges in industrial assembly, particularly where corrosion resistance and high-strength fastening are non-negotiable. The brass material inherently resists rust and galvanic corrosion, making it a superior choice for marine, chemical processing, and plumbing applications. The Class 3A thread fit and coarse UNC threading ensure a tight, reliable seal that withstands vibration and thermal cycling, preventing loosening in dynamic environments. Paired with a 3/8" hex drive and standard flat head profile, it allows for high-torque installation and a flush finish, which is essential for machinery, electrical enclosures, and structural frameworks where safety and a clean aesthetic are paramount. This combination of material properties and precision engineering delivers long-term reliability, reducing maintenance cycles and total cost of ownership.

Specification Summary & Compliance

This screw maintains high dimensional accuracy with a Class 3A thread fit for superior interchangeability and a secure fit. It is manufactured to the UNC (Unified Coarse) thread standard with a size of 5/8"-11. The product is fully compliant with the ASME B18.3 standard for dimensional and mechanical requirements. It also meets critical environmental and safety regulations, being RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it is free of hazardous substances and safe for use in regulated markets.