S-90585A211 6-32 x 5/16" ASME B18.3, ASTM F879 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 and extended service life.
• High mechanical strength and reliability, offering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications.
• Precision Class 3A thread fit ensures secure, vibration-resistant connections with minimal risk of loosening.
• Efficient installation and flush seating with a standard 82° countersink angle and 5/64" hex drive for streamlined assembly.
• Full threading along the 5/16" length provides maximum grip and load distribution in various materials.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
• Durable UNC coarse thread design enhances engagement and resists stripping in coarse-grained materials.

Professional Applications & Engineering Value

This 6-32 UNC Flat Head Screw in 316 Stainless Steel is engineered to address critical challenges in industrial settings, such as corrosion in marine, chemical, and outdoor applications. The passivated finish significantly boosts its resistance to oxidants and chlorides, while the Class 3A thread fit and coarse UNC threads deliver reliable, high-strength fastening that minimizes back-out in high-vibration machinery. Its flat head with an 82° countersink allows for a flush surface finish, essential in aerospace, automotive, and electronics assembly where aerodynamics and safety are paramount. By integrating robust 70,000 psi tensile strength, these screws ensure long-term structural integrity, reducing maintenance costs and downtime in industrial fastening systems.

Specification Summary & Compliance

This product adheres to precise dimensional tolerances, including a Class 3A thread fit per UNC standards and head diameter tolerance of -0.044" to 0". It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and suitable for global supply chains.