S-90585A287 10-32 x 3/8" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel and passivated finish, ideal for harsh environments like marine or chemical processing.
• High tensile strength of 70,000 psi ensures reliable, durable fastening under significant mechanical stress.
• Precision Class 3A UNF fine threading provides a tighter, more secure fit with reduced risk of stripping in critical assemblies.
• Fully threaded design offers maximum grip and load distribution along the entire 3/8" length for enhanced joint integrity.
• Standard 82° countersink angle and flat head allows for a flush, low-profile installation in pre-drilled holes.
• 1/8" hex drive enables easy installation and removal with standard tools, minimizing assembly time.
• Compliance with RoHS 3 and REACH ensures environmental safety and meets global regulatory standards for industrial use.

Professional Applications & Engineering Value

This 10-32 UNF flat head screw in 316 stainless steel is engineered to address common industrial challenges such as corrosion, vibration loosening, and high-stress fatigue. The passivated finish enhances surface durability, preventing rust in humid or corrosive settings like offshore equipment, food processing machinery, and chemical plants. With its Class 3A thread fit and fine thread spacing, it delivers superior clamping force and resistance to back-off, making it ideal for precision applications in aerospace, automotive, and electronic enclosures. The fully threaded design and Rockwell B55 hardness ensure consistent performance in dynamic loads, while the 82° countersink provides a seamless fit for streamlined assemblies.

Specification Summary & Compliance

This screw adheres to ASME B18.3 standards, featuring precise dimensions including a head diameter of 0.411" and length of 3/8". The Class 3A thread fit ensures tight tolerances for high-performance applications, with right-hand UNF fine threading for secure engagement. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming its suitability for regulated industries. Additional specifications include a tensile strength of 70,000 psi and Rockwell B55 hardness, guaranteeing reliability in demanding environments.