S-92240A642 3/8"-16 x 4 1/2" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
• High tensile strength of 80,000 psi ensures reliable performance in demanding heavy-duty applications
• Rockwell B70 hardness provides superior durability and resistance to wear and deformation
• Coarse UNC thread with Class 2A fit enables quick installation and secure fastening in various materials
• Full threading along 4 1/2" length offers maximum grip and load distribution across the entire fastener
• External hex drive design allows for high-torque application using standard tools
• Compliance with major industry standards including ASME B18.2.1, RoHS 3, and REACH

Professional Applications & Engineering Value

This 3/8"-16 UNC hex head screw delivers critical engineering advantages for industrial assembly applications where corrosion resistance and structural integrity are paramount. The 18-8 Stainless Steel composition provides excellent protection against rust and chemical degradation, making it ideal for outdoor equipment, marine environments, and chemical processing facilities. The coarse thread configuration ensures superior holding power in softer materials and faster installation times, while the external hex drive accommodates high torque requirements without stripping. With its fully threaded design and substantial 4 1/2" length, this fastener distributes clamping forces evenly across joined components, preventing joint failure in vibration-prone applications. These characteristics make it particularly valuable for structural steel connections, heavy machinery assembly, and infrastructure projects requiring long-term reliability and minimal maintenance.

Specification Summary & Compliance

This heavy-duty fastener features precision UNC coarse threads with Class 2A fit according to ASME B18.2.1 specifications, ensuring consistent dimensional accuracy and proper thread engagement. The manufacturing process adheres to strict quality controls to maintain the specified 0.375" thread diameter and right-hand thread direction. Regulatory compliance includes RoHS 3 (2015/863/EU) for restricted substance management and REACH (EC 1907/2006) for chemical safety, confirming this product meets current environmental and safety standards for industrial use across global markets.