S-92198A256 1 1/4"-7 x 5 1/2" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance thanks to 18-8 Stainless Steel construction, ensuring long-term reliability in harsh environments.
• Superior mechanical strength with 80,000 psi tensile strength and Rockwell B70 hardness for demanding heavy-duty applications.
• Reliable fastening and ease of installation provided by the external hex drive and coarse UNC threads, allowing for quick assembly with standard tools.
• Precise thread engagement with Class 2A thread fit, minimizing the risk of cross-threading and ensuring consistent performance.
• Optimized load distribution due to the partially threaded design, concentrating strength where it's needed most.
• Compliance with industry standards including ASME B18.2.1, guaranteeing dimensional accuracy and interchangeability.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements.

Professional Applications & Engineering Value

This heavy-duty hex head screw is engineered to solve critical challenges in industrial settings where vibration, corrosion, and high tensile loads are common. The 18-8 Stainless Steel material provides excellent resistance to rust and chemical exposure, making it ideal for outdoor machinery, marine equipment, and chemical processing plants. The coarse UNC thread and external hex drive facilitate rapid installation and removal, reducing labor time in assembly lines and structural frameworks. With its partial threading, the screw offers enhanced grip and stress management in bolted joints, preventing loosening under dynamic loads. These features ensure reliable performance in construction, manufacturing, and heavy equipment applications, delivering long-term engineering value and reduced maintenance costs.

Specification Summary & Compliance

This 1 1/4"-7 UNC hex head screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent tolerance and a thread length of 2 3/4" minimum. It is manufactured in accordance with ASME B18.2.1 specifications, ensuring reliability and compatibility. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for global industrial use.