S-92210A450 1/2"-20 x 1 3/4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish, ideal for harsh environments and extended service life.
• Exceptional thread precision with Class 3A fit ensures reliable, vibration-resistant fastening and prevents loosening.
• High tensile strength of 70,000 psi provides dependable performance under heavy loads and stress.
• Flush mounting capability with an 82° countersink angle and standard flat head profile for a smooth, secure finish.
• Efficient installation and removal using a 5/16" hex drive, allowing for high torque application without slippage.
• Full threading along the 1 3/4" length offers maximum grip and adjustability in various material thicknesses.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.

Professional Applications & Engineering Value

This 1/2"-20 UNF flat head screw is engineered to address critical challenges in industrial and mechanical assemblies where reliability and precision are paramount. Constructed from 18-8 Stainless Steel with a passivated finish, it delivers excellent resistance to corrosion and oxidation, making it suitable for applications in marine, chemical processing, and outdoor equipment. The Class 3A thread fit and fine thread spacing provide a tight, secure connection that minimizes the risk of vibration-induced failures, essential in machinery and automotive components. With a hex drive design, installation is streamlined for high-torque scenarios, reducing assembly time and improving efficiency. Its fully threaded body and 82° countersink angle ensure a flush fit in pre-drilled holes, enhancing structural integrity and aesthetics in frameworks and enclosures.

Specification Summary & Compliance

This screw features a 1/2"-20 UNF thread with Class 3A precision fit, ensuring tight tolerances and reliable performance. It adheres to ASME B18.3 manufacturing standards for dimensional accuracy and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility. Additional specifications include a Rockwell B55 hardness and right-hand threading for standard applications.