S-92198A698 5/16"-18 x 3 3/4" 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 environments and long-term reliability
• High tensile strength of 80,000 psi ensures secure, vibration-resistant connections in demanding applications
• Partially threaded design with Class 2A fit provides precise engagement and reduced risk of cross-threading during assembly
• External hex drive and hex head allow for high-torque installation using standard tools, speeding up assembly processes
• Coarse UNC thread pattern facilitates quick installation and superior performance in softer materials or where debris is present
• Rockwell B70 hardness offers excellent durability and resistance to wear under repeated use
• Compliance with ASME B18.2.1, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety regulations

Professional Applications & Engineering Value

This 5/16"-18 UNC hex head screw is engineered to address common industrial fastening challenges, such as corrosion-induced failure and assembly inefficiency. The 18-8 stainless steel material provides superior resistance to rust and chemical exposure, making it suitable for outdoor equipment, marine applications, and chemical processing plants. Its partially threaded configuration ensures that the unthreaded shank bears shear loads effectively, while the coarse UNC threads enable faster installation and reliable holding power in wood, plastic, or metal substrates. The external hex drive design allows for high torque application with common wrenches, reducing installation time and minimizing tool wear. These features collectively enhance operational uptime and reduce maintenance costs in industrial assembly lines, construction projects, and machinery maintenance.

Specification Summary & Compliance

This screw features a 5/16"-18 UNC coarse thread with Class 2A thread fit for consistent dimensional accuracy and reliable engagement. It meets ASME B18.2.1 specifications for hex head screws, ensuring interchangeability and performance in mechanical assemblies. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to hazardous substance restrictions and environmental health standards.