S-91858A628 3/8"-16 x 1 1/2" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
• Optimized thread engagement through UNC coarse spacing and Class 2A thread fit, ensuring secure fastening and vibration resistance
• Flush mounting capability with standard 82° countersink angle and flat head design for seamless surface integration
• Full-threaded design providing maximum grip length and uniform stress distribution along the entire fastener
• Right-hand threading with standard UNC thread type for compatibility with existing industrial equipment and tooling
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

This 3/8"-16 UNC flat head screw in 316 stainless steel delivers critical performance advantages for demanding industrial applications. The combination of passivated finish and marine-grade stainless steel material provides exceptional resistance to chemical exposure, saltwater corrosion, and extreme temperatures, making it ideal for marine equipment, chemical processing plants, and food processing machinery. The fully threaded design with coarse spacing ensures maximum holding power in various materials while the 82° countersink angle allows for flush installation in precision assemblies. These flat head screws maintain structural integrity under heavy vibration and load conditions, solving common failure points in industrial machinery, transportation equipment, and structural frameworks where reliability and corrosion resistance are paramount.

Specification Summary & Compliance

This fastener maintains Class 2A thread fit tolerances with UNC coarse thread specifications (3/8"-16 thread size) and is manufactured in compliance with ASME B18.6.3 standards. The product meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) requirements, ensuring suitability for global industrial markets. Dimensional specifications include a 1-1/2" length, 0.717" head diameter, and standard flat head profile with slotted drive style for consistent installation performance.