S-90585A219 6-32 x 1 1/4" ASME B18.3, ASTM F879 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh environments like marine or chemical processing.
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads, reducing the risk of fastener failure in critical applications.
• Precise Class 3A thread fit provides superior engagement and vibration resistance, minimizing loosening in dynamic industrial machinery.
• Hex drive design (5/64") allows for easy installation and high torque application, speeding up assembly while preventing tool slippage.
• Fully threaded shank offers consistent holding power along the entire length, enhancing grip in various material thicknesses.
• 82° countersink angle and flat head profile enable flush mounting for a clean, aerodynamic finish in assembled products.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety, simplifying procurement for regulated sectors.

Professional Applications & Engineering Value

These 6-32 UNC flat head screws in 316 stainless steel are engineered to address common industrial challenges, such as corrosion-induced degradation and mechanical stress in demanding settings. The passivated finish enhances surface durability, preventing pitting and rust in humid or saline conditions, making them ideal for marine equipment, food processing machinery, and chemical plants. With a coarse thread spacing and Class 3A thread fit, they provide quick assembly and secure fastening in metals or composites, reducing maintenance downtime. The hex drive ensures efficient installation in tight spaces, while the fully threaded design supports uniform load distribution, essential for applications requiring high vibration resistance and long-term reliability.

Specification Summary & Compliance

This product features precise dimensional tolerances, including a Class 3A thread fit per UNC standards and a head diameter tolerance of -0.044" to 0". It complies with ASME B18.3 specifications for consistency and performance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are adhered to for global industrial use.