S-91247A740 1/2"-13 x 8" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Zinc plating provides superior corrosion resistance, extending the screw's service life in harsh or outdoor environments.
• Grade 5 classification and Rockwell C25 hardness offer a balance of strength and toughness, suitable for demanding industrial and construction uses.
• 1/2"-13 UNC coarse thread with Class 2A fit allows for quicker assembly and better performance in softer materials or where debris is present.
• Partially threaded design enables precise clamping force on joined materials, improving joint integrity.
• External hex drive and hex head facilitate easy installation and removal with standard tools, speeding up maintenance and assembly processes.
• Compliance with ASME B18.2.1, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations, providing peace of mind for global projects.

Professional Applications & Engineering Value

This Grade 5 Hex Head Screw is engineered to address critical challenges in heavy-duty industrial applications, such as construction, machinery assembly, and structural frameworks. Made from high-strength steel with a zinc-plated finish, it combats corrosion and wear in demanding environments, reducing maintenance costs and downtime. The 1/2"-13 UNC coarse thread and partial threading enhance grip and load distribution, preventing loosening under vibration and ensuring secure fastening in materials like metal and wood. By meeting ASME B18.2.1 standards, it guarantees dimensional accuracy and reliability, making it a trusted choice for engineers and procurement specialists seeking durable, high-performance fasteners that uphold safety and efficiency in projects.

Specification Summary & Compliance

This screw features precise Class 2A thread fit and UNC coarse threading with a thread size of 1/2"-13, ensuring compatibility and ease of use. It adheres to ASME B18.2.1 and SAE J429 specifications for dimensional and mechanical properties, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for environmentally conscious applications.