S-91773A124 5-40 x 1/4" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish, ensuring long-term reliability in harsh environments.
• High tensile strength of 100,000 psi provides secure, vibration-resistant fastening for demanding industrial applications.
• Rockwell B100 hardness offers excellent durability and resistance to wear, extending service life.
• Fully threaded design with Class 2A fit ensures consistent engagement and easy installation in coarse UNC threads.
• Phillips No. 2 drive allows for efficient torque application and reduced cam-out during assembly.
• Compliance with ASME B18.6.3 guarantees precise dimensional accuracy and interchangeability.
• RoHS 3 and REACH compliance ensures environmental safety and meets global regulatory standards.

Professional Applications & Engineering Value

This 5-40 UNC Rounded Head Phillips Screw is engineered from 18-8 Stainless Steel with a passivated finish to combat corrosion and oxidation in challenging settings like industrial machinery, automotive assemblies, and electronic enclosures. The coarse thread and fully threaded design facilitate quick installation and strong holding power, reducing the risk of loosening under vibration. With a high tensile strength and precise Class 2A thread fit, it addresses common fastening issues such as thread stripping and material fatigue, making it ideal for applications requiring reliable, long-lasting connections in demanding environments.

Specification Summary & Compliance

This screw features a 5-40 UNC thread size with Class 2A thread fit for standard tolerance and easy assembly. It adheres to ASME B18.6.3 specifications for dimensional accuracy and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable use.