S-92198A447 1/2"-20 x 4 1/2" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and reducing long-term maintenance costs.
• Exceptional mechanical strength offering 80,000 psi tensile strength and Rockwell B70 hardness for reliable performance under high-stress conditions.
• Optimized for secure fastening featuring a 3/4" hex head and external hex drive for high-torque installation and easy removal with standard tools.
• Precision fine threading (1/2"-20 UNF) with Class 2A thread fit ensures tight, secure connections and excellent vibration resistance.
• Versatile partially threaded design provides an unthreaded shank for precise clamping and alignment in demanding assemblies.
• Full compliance with major standards including ASME B18.2.1, ensuring dimensional accuracy, interchangeability, and reliable performance.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting stringent global regulatory requirements.

Professional Applications & Engineering Value

This 1/2"-20 UNF hex head screw is engineered to solve critical fastening challenges in industrial applications where reliability is non-negotiable. The 18-8 Stainless Steel material provides excellent resistance to corrosion and oxidation, making it suitable for use in demanding environments such as machinery, construction, and marine equipment. The partially threaded design and fine thread configuration offer superior clamping force and vibration resistance, preventing loosening in dynamic or high-load assemblies. With an external hex drive and substantial head width, it allows for high torque application, ensuring a secure fit that reduces the risk of stripping and simplifies maintenance. This screw delivers consistent performance, meeting the precise requirements of heavy-duty fastening solutions while adhering to recognized engineering standards.

Specification Summary & Compliance

This screw features a 1/2"-20 UNF thread with a Class 2A thread fit, ensuring precise dimensional accuracy and easy assembly. It is manufactured in accordance with ASME B18.2.1 specifications, guaranteeing consistent quality and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.