S-92198A602 1 1/4"-7 x 20" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 18-8 Stainless Steel construction, ensuring long-term reliability in harsh industrial environments.
• High tensile strength of 80,000 PSI provides superior load-bearing capacity for demanding structural and heavy machinery applications.
• Rockwell B70 hardness offers excellent resistance to wear and deformation, extending the service life of the fastener.
• Coarse 1 1/4"-7 UNC threading enables faster installation and better performance in materials where fine threads might strip or fail.
• Partially threaded design allows for precise clamping force on specific sections, preventing joint loosening under vibration.
• Class 2A thread fit ensures consistent, reliable engagement with standard nuts for simplified assembly and maintenance.
• Compliance with ASME B18.2.1, RoHS 3, and REACH guarantees adherence to strict mechanical and environmental safety standards for global industrial use.

Professional Applications & Engineering Value

This heavy-duty hex head screw is engineered to solve critical challenges in structural steelwork, heavy machinery assembly, and large-scale construction projects. The 18-8 Stainless Steel material provides excellent resistance to oxidation and chemical exposure, making it ideal for outdoor, marine, or chemical processing environments where corrosion would compromise joint integrity. The 1 1/4"-7 UNC coarse thread and external hex drive design facilitate rapid installation with standard tools, reducing labor time in large-scale assemblies. Its 80,000 PSI tensile strength and Rockwell B70 hardness ensure the fastener maintains clamp load under extreme stress and vibration, preventing catastrophic failures in industrial applications such as bridge construction, mining equipment, and processing plant infrastructure.

Specification Summary & Compliance

This screw features a 1 1/4"-7 UNC coarse thread with a Class 2A thread fit for standard tolerance and reliable mating. The 20" length and partially threaded section provide optimal unthreaded shank for shear applications. Manufactured in compliance with ASME B18.2.1 dimensional standards, ensuring interchangeability and performance. The product is confirmed RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental regulations for hazardous substances.