S-92198A148 1 1/8"-7 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 environments and reducing long-term replacement costs.
• High-strength performance with 80,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing in demanding applications.
• Secure and efficient fastening provided by the coarse UNC thread and Class 2A fit, ensuring easy assembly and vibration resistance.
• Robust external hex drive allows for high-torque installation with standard tools, minimizing stripping and improving installation speed.
• Optimized partial threading concentrates threads where needed, providing strong grip and reducing the risk of cross-threading.
• Compliance with major standards including ASME B18.2.1, ensuring dimensional accuracy and interchangeability in professional assemblies.
• Environmental and safety adherence with RoHS 3 and REACH compliance, making it suitable for regulated industries and global supply chains.

Professional Applications & Engineering Value

This 1 1/8"-7 UNC hex head screw is engineered to solve critical challenges in industrial applications where corrosion resistance and high tensile strength are paramount. The 18-8 Stainless Steel material prevents rust and degradation in moist or chemical-exposed settings, extending service life and reducing maintenance. Its coarse thread and partial threading design enhance grip in softer materials and prevent thread damage during repeated disassembly. The external hex drive facilitates quick, high-torque fastening with common wrenches, streamlining assembly in construction, machinery, and heavy equipment. By meeting ASME B18.2.1 specifications, it ensures precise fit and reliability, making it a trusted choice for structural and mechanical fastening where failure is not an option.

Specification Summary & Compliance

This screw features a 1 1/8"-7 UNC coarse thread with Class 2A thread fit for standard tolerance and easy assembly. It is manufactured in compliance with ASME B18.2.1 for dimensional consistency and performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets environmental and safety regulations for hazardous substances.