S-92210A434 5/16"-18 x 6" ASME B18.3 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, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
• Precise Class 3A thread fit ensures reliable engagement and vibration resistance in critical assemblies
• Hex drive design provides secure tool engagement and high torque transmission during installation
• 82° countersink angle allows for flush mounting in standard countersunk holes
• Fully threaded UNC coarse spacing enables faster installation and superior holding power
• Comprehensive compliance with ASME B18.3 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

These 18-8 stainless steel flat head screws deliver exceptional performance in demanding industrial settings where corrosion resistance and structural integrity are paramount. The combination of 70,000 psi tensile strength and Rockwell B55 hardness ensures reliable performance under heavy loads and vibration. The hex drive design prevents cam-out during high-torque installation, while the UNC coarse thread spacing provides faster assembly and superior pull-out resistance. The passivated finish enhances the natural corrosion resistance of stainless steel, making these flat head screws ideal for machinery, structural frameworks, and outdoor applications where environmental factors challenge fastener durability.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 specifications with precision Class 3A thread fit for superior dimensional accuracy. Features UNC coarse thread spacing (5/16"-18) and 82° countersink angle for standard flush mounting applications. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.