S-92210A174 5/16"-18 x 7/16" ASME B18.3, ASTM F879 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under heavy loads
• Precise thread engagement with Class 3A fit and UNC coarse threading ensuring secure fastening and vibration resistance
• Optimized flush mounting with standard 82° countersink angle and flat head design for smooth surface finishes
• Efficient installation with hex drive design providing superior torque transmission and reduced tool slippage
• Full thread coverage along the entire 7/16" length for maximum grip strength and load distribution
• Regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial applications

Professional Applications & Engineering Value

These 5/16"-18 UNC flat head screws deliver critical engineering advantages where flush surface mounting and corrosion resistance are paramount. The 18-8 stainless steel composition with passivated finish provides exceptional protection against chemical exposure and atmospheric corrosion, making them ideal for marine equipment, food processing machinery, and outdoor industrial applications. The Class 3A thread fit ensures precise tolerance control for vibration-resistant assemblies, while the hex drive configuration enables high-torque installation in confined spaces. The 82° countersink angle and flat head profile create seamless surface transitions, preventing snagging and maintaining aerodynamic or hygienic surface requirements in automotive, aerospace, and manufacturing applications.

Specification Summary & Compliance

Manufactured to exact inch system dimensions with Class 3A thread fit per UNC standards, ensuring precise interchangeability. The screws feature fully threaded design with 5/16"-18 UNC coarse spacing and maintain strict compliance with ASME B18.3 manufacturing specifications. Environmental and safety standards adherence includes RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, confirming suitability for regulated industrial markets and international supply chains.