S-92240A103 1/4"-28 x 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 and outdoor applications.
• Superior mechanical strength with 80,000 psi tensile strength and Rockwell B70 hardness, ensuring reliable performance under high-stress conditions.
• Secure and precise fastening thanks to the Class 2A thread fit and UNF fine thread, providing excellent vibration resistance and reduced loosening.
• Efficient installation and removal with the external hex drive and 7/16" head width, allowing for high torque application with standard tools.
• Maximum grip and load distribution from the fully threaded design, enhancing holding power across the entire 1/2" length.
• Guaranteed dimensional consistency and interchangeability by conforming to the ASME B18.2.1 standard.
• Safe for sensitive applications as it is RoHS 3 and REACH compliant, free from hazardous substances.

Professional Applications & Engineering Value

This 1/4"-28 UNF hex head screw is engineered to address critical challenges in industrial assembly, machinery, and structural applications where vibration resistance and long-term reliability are paramount. The 18-8 stainless steel material offers excellent resistance to rust and corrosion, making it suitable for use in demanding environments, including marine, chemical processing, and food-grade equipment. The fine thread (UNF) and Class 2A fit ensure tight, precise connections that minimize the risk of thread stripping and loosening under dynamic loads. Combined with an external hex drive for high-torque installation, this fully threaded fastener delivers consistent clamping force and durability, reducing maintenance needs and downtime in B2B procurement scenarios.

Specification Summary & Compliance

This screw features a 1/4"-28 UNF thread with a Class 2A thread fit for precise dimensional tolerance. It is manufactured in compliance with the ASME B18.2.1 standard, ensuring consistent quality and interchangeability. The product is also verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for industrial use.