S-92941A560 1/4"-28 x 1/2" ASME B18.2.1 Brass Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from high-quality brass construction, ideal for harsh environments and reducing maintenance costs
• Exceptional mechanical strength with 50,000 psi tensile strength and Rockwell B55 hardness for reliable, long-lasting fastening under load
• Precise, secure thread engagement thanks to Class 2A thread fit and UNF fine threading, minimizing the risk of loosening in vibration-prone applications
• Efficient installation and removal with a standard external hex drive and hex head design, compatible with common tools for faster assembly
• Full-threaded design provides maximum grip and holding power along the entire 1/2" length for superior joint integrity
• Guaranteed dimensional accuracy and interchangeability, manufactured to meet the stringent requirements of ASME B18.2.1
• Safe for regulated industries with full compliance to RoHS 3 and REACH, ensuring no hazardous substances are used

Professional Applications & Engineering Value

This 1/4"-28 UNF brass hex head screw is engineered to solve critical challenges in industrial assembly, particularly where corrosion resistance and reliable performance are non-negotiable. The brass material inherently resists rust and galvanic corrosion, making it a superior choice for electrical components, marine hardware, and plumbing systems exposed to moisture. The fine UNF thread and Class 2A fit provide a tighter, more vibration-resistant connection than coarse threads, which is vital in machinery and equipment subject to constant motion or thermal cycling. Its external hex drive allows for high-torque installation, ensuring a secure clamp every time. By combining material durability with precision threading, this screw delivers long-term reliability, reduces the frequency of replacements, and maintains system integrity in demanding industrial applications.

Specification Summary & Compliance

This screw adheres to precise dimensional and performance standards, including a Class 2A thread fit for consistent assembly and a UNF (Unified National Fine) thread type with a size of 1/4"-28. Manufacturing and quality are governed by the ASME B18.2.1 specification. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from restricted hazardous substances for safe use in global markets.