S-90585A036 1/4"-20 x 1/4" Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction and passivated finish, ideal for harsh environments and extended service life.
• Exceptional thread reliability with Class 3A fit and UNC coarse thread, ensuring precise, secure, and vibration-resistant fastening.
• High-strength performance offering 70,000 psi tensile strength and Rockwell B55 hardness for demanding mechanical applications.
• Streamlined flush installation featuring an 82° countersink angle and undercut flat head profile for a smooth, non-protruding finish.
• Efficient assembly and removal with a 5/32" hex drive, providing high torque transfer and reducing tool slippage.
• Full-length threading for maximum grip and load distribution along the entire 1/4" length.
• Compliance with global standards including RoHS 3 and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This 1/4"-20 UNC Flat Head Screw is engineered to solve critical challenges in industrial assembly. The 316 Stainless Steel material and passivated finish provide outstanding resistance to chemicals, saltwater, and oxidation, making it perfect for marine, chemical processing, and food industry equipment. The Class 3A thread fit and coarse UNC thread offer superior holding power and reduce the risk of cross-threading in high-vibration environments. The flat head with undercut and 82° countersink ensures a flush mount, eliminating snagging points and improving aerodynamic or aesthetic surfaces. Combined with a hex drive for secure tool engagement, this screw delivers reliable, long-term performance in machinery, structural frameworks, and precision enclosures.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a Class 3A thread fit for high precision. Key dimensional tolerances include a head diameter of 0.531" and a length of 1/4". It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for regulated industrial and international applications.