S-92198A127 1/2"-13 x 1 3/4" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 Stainless Steel construction, ideal for harsh industrial environments and outdoor applications.
• High tensile strength of 80,000 psi ensures reliable performance under significant load and stress, preventing fastener failure.
• External hex drive and hex head design provides a secure grip for easy installation and removal with standard tools, reducing assembly time.
• Coarse UNC thread and Class 2A thread fit offer quick engagement and reliable fastening, even in materials where fine threads might strip.
• Partially threaded shank allows for unthreaded bearing surface, providing superior clamp load and vibration resistance in structural joints.
• Rockwell B70 hardness delivers excellent durability and wear resistance, extending the screw's service life in demanding applications.
• Full compliance with ASME B18.2.1, RoHS 3, and REACH guarantees consistent quality, dimensional accuracy, and environmental safety for global supply chains.

Professional Applications & Engineering Value

This 1/2"-13 UNC hex head screw is engineered to solve critical fastening challenges in heavy machinery, structural steelwork, and industrial equipment assembly. The 18-8 Stainless Steel material provides excellent resistance to rust and chemical corrosion, making it suitable for applications exposed to moisture, chemicals, or varying temperatures. The coarse thread and Class 2A thread fit ensure rapid, secure installation in both metal and wood, reducing the risk of cross-threading. Its partially threaded design concentrates the clamping force, preventing loosening under vibration—a common issue in conveyor systems, construction frameworks, and automotive components. By meeting ASME B18.2.1 specifications, this screw delivers predictable performance and interchangeability, streamlining maintenance and procurement for engineers and OEMs.

Specification Summary & Compliance

This screw adheres to Class 2A thread fit tolerances for consistent assembly and is manufactured to the ASME B18.2.1 standard, ensuring dimensional precision and mechanical reliability. It is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming the absence of hazardous substances and supporting environmentally responsible sourcing. The specified inch system measurements, including a 1/2"-13 UNC coarse thread and a length of 1 3/4", provide clear compatibility with North American and international industrial designs.