S-92198A280 1 1/4"-7 x 8" 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, ideal for harsh industrial environments and outdoor applications.
• High tensile strength of 80,000 psi ensures reliable performance under heavy loads and prevents fastener failure.
• Rockwell B70 hardness provides superior durability and resistance to wear and deformation during installation and use.
• Coarse UNC thread and Class 2A fit enable faster assembly and easier alignment, reducing installation time and labor costs.
• External hex drive and large 1 7/8" head offer high torque capability and secure tool engagement for straightforward installation and removal.
• Partial threading design provides an unthreaded shank for precise clamping and increased shear strength in structural connections.
• Full compliance with ASME B18.2.1, RoHS 3, and REACH guarantees consistent quality, safety, and environmental responsibility for global projects.

Professional Applications & Engineering Value

This 1 1/4"-7 UNC hex head screw is engineered to solve critical challenges in heavy machinery, structural steelwork, and large-scale fabrication. The 18-8 Stainless Steel material inherently resists rust and chemical exposure, making it suitable for marine, chemical processing, and food industry applications where corrosion is a primary concern. The coarse thread and Class 2A thread fit ensure reliable engagement even in applications with slight misalignment or vibration, reducing the risk of loosening. With an 8" length and partial threading, it provides optimal grip length for thick materials and assemblies, distributing clamp load effectively to prevent joint failure. The external hex drive allows for high-torque installation with standard tools, streamlining assembly in construction, bridgework, and industrial equipment maintenance.

Specification Summary & Compliance

This heavy-duty screw features a 1 1/4"-7 UNC coarse thread with a Class 2A thread fit for standard tolerance and interchangeability. It is manufactured in compliance with the ASME B18.2.1 standard, ensuring dimensional accuracy and mechanical properties. The product is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to strict environmental and safety regulations for hazardous substances.