S-92198A405 7/16"-20 x 1 3/4" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments and reducing maintenance costs.
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B70 hardness for reliable, high-load fastening applications.
• Secure and precise engagement with 7/16"-20 UNF fine threading, providing superior vibration resistance compared to coarse threads.
• Optimized for high-torque installation thanks to the external hex drive and 5/8" head width, allowing for easy and secure wrenching.
• Versatile partial threading design ensures a strong grip on materials while leaving a smooth shank for precise alignment.
• Guaranteed dimensional consistency and interchangeability, manufactured to meet the rigorous ASME B18.2.1 standard.
• Safe for regulated industries with full compliance to RoHS 3 and REACH environmental directives.

Professional Applications & Engineering Value

This 18-8 Stainless Steel Hex Head Screw is engineered to solve critical challenges in demanding applications such as heavy machinery, marine equipment, and chemical processing systems. The UNF fine thread profile offers a higher number of threads per inch, creating a tighter seal and superior resistance to loosening under vibration—a common failure point in industrial settings. The external hex drive and robust head design facilitate high-torque installation with standard tools, preventing stripping and ensuring a secure fit. The partial threading provides a non-threaded bearing surface that increases shear strength and prevents galling in assemblies. Combined with the inherent corrosion resistance of stainless steel, this fastener delivers long-term reliability, reducing downtime and replacement frequency in corrosive or high-stress environments.

Specification Summary & Compliance

This screw features a 7/16"-20 UNF thread with a Class 2A thread fit for consistent assembly. The length is 1 3/4" with a minimum thread length of 1 1/8". It is manufactured in accordance with the ASME B18.2.1 standard, ensuring dimensional accuracy and performance reliability. The product is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.