S-90585A218 6-32 x 1" 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 industrial environments and extended service life.
• High-strength performance offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, durable fastening under stress.
• Precision thread fit with Class 3A UNC coarse threads ensuring secure, vibration-resistant connections and easier assembly.
• Optimal flush mounting with a standard flat head and 82° countersink angle for a smooth, finished surface in countersunk applications.
• Efficient installation and removal facilitated by the hex drive style, allowing for high torque application and reduced tool slippage.
• Full threading along the 1" length provides maximum grip and holding power across the entire fastener engagement.
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for quality, safety, and environmental responsibility.

Professional Applications & Engineering Value

These 6-32 UNC flat head screws are engineered to address critical challenges in demanding industrial settings. The 316 Stainless Steel material, combined with a passivated finish, provides exceptional resistance to corrosion from chemicals, saltwater, and extreme temperatures, making them ideal for marine, chemical processing, and outdoor equipment. The Class 3A thread fit and coarse thread spacing ensure a tight, reliable seal that minimizes loosening under vibration, which is crucial in machinery, automotive, and aerospace assemblies. The flat head design with an 82° countersink angle allows for a flush fit, reducing protrusion risks and improving aerodynamic or aesthetic surfaces. With full threading and a hex drive for secure torque application, these screws enhance assembly efficiency and longevity in high-stress applications, supporting robust engineering solutions where precision and durability are paramount.

Specification Summary & Compliance

This product adheres to precise dimensional tolerances, including a head diameter tolerance of -0.044" to 0" and Class 3A thread fit per UNC standards, ensuring consistent performance and interchangeability. It meets ASME B18.3 specifications for flat head screw design, guaranteeing engineering reliability. Additionally, compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms its environmental safety and suitability for global markets, with no restricted substances used in manufacturing.