S-92210A591 5/16"-18 x 2" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish for long service life in harsh environments
• Superior installation control through hex drive design that prevents cam-out and ensures secure fastening
• Maximum thread engagement with fully threaded design and Class 3A fit for reliable performance in high-vibration applications
• Flush mounting capability with 82° countersink angle and standard flat head profile for clean, professional finishes
• Heavy-duty performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding industrial applications
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations for global supply chain compatibility
• Quick assembly advantage with coarse UNC thread spacing that reduces installation time and improves productivity

Professional Applications & Engineering Value

These 5/16"-18 UNC flat head screws provide critical solutions for industrial applications where flush mounting and corrosion resistance are paramount. The combination of 18-8 stainless steel material and passivated finish ensures reliable performance in demanding environments including marine applications, food processing equipment, and outdoor machinery. The hex drive style offers superior torque transmission compared to slotted drives, preventing stripping during installation in hard materials. With Class 3A thread fit and coarse thread spacing, these fasteners maintain secure connections in high-vibration settings while allowing for rapid installation. The fully threaded design maximizes holding power across the entire 2" length, making them ideal for joining thick materials in structural applications where pull-out resistance is critical.

Specification Summary & Compliance

These industrial-grade flat head screws feature precision UNC thread form with Class 3A thread fit for superior dimensional accuracy and reliable performance. Manufacturing complies with ASME B18.3 specifications ensuring consistent quality and interchangeability. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial applications and supply chains. Critical dimensions include 5/16"-18 thread size, 2" length, 0.656" head diameter, and 82° countersink angle for standardized installation across various applications.