S-97595A263 1/4"-20 x 1" ASME B18.3 Brass Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from durable brass material, ideal for harsh industrial environments and extending service life.
• Precise Class 3A thread fit ensures reliable, vibration-resistant connections and reduces the risk of assembly failures.
• High tensile strength of 50,000 psi provides robust fastening power for demanding mechanical applications.
• Standard 82° countersink angle and flat head design allows for a flush, secure fit in countersunk holes, improving aesthetics and safety.
• Hex drive (5/32") compatibility offers easy installation and high torque application with common tools, speeding up assembly processes.
• Full threading along the 1" length maximizes grip and load distribution across the entire fastener for enhanced joint integrity.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees consistent quality, safety, and environmental standards for global industrial use.

Professional Applications & Engineering Value

This 1/4"-20 UNC flat head brass screw is engineered to address critical challenges in industrial assembly, such as corrosion in electrical components, marine hardware, and plumbing systems. The brass material offers excellent resistance to rust and galvanic corrosion, while the Class 3A thread fit and coarse UNC threading provide secure, repeatable fastening that withstands vibrations and dynamic loads. With a Rockwell B55 hardness and 50,000 psi tensile strength, it ensures durability in high-stress applications. The 82° countersink angle and hex drive design facilitate quick, flush installations, reducing assembly time and improving overall system reliability in machinery, automotive, and construction projects.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including Class 3A thread fit for tight tolerances and UNC coarse threading (1/4"-20) with a right-hand direction. It meets ASME B18.3 specifications for consistency and performance, and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances for safe industrial use.