S-92210A373 5-40 x 5/16" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive Flat Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ideal for harsh environments
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing performance
- Precision thread engagement with Class 3A fit and 5-40 UNC coarse threading ensuring secure fastening and vibration resistance
- Efficient installation using standard 5/64" hex drive, reducing assembly time and tool wear
- Flush mounting capability with standard 82° countersink angle flat head design for smooth surface finishes
- Full regulatory compliance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH
- Complete threading coverage along the 5/16" length for maximum grip strength in various material thicknesses
Professional Applications & Engineering Value
These 18-8 stainless steel flat head screws deliver critical performance advantages in demanding industrial applications where corrosion resistance and mechanical reliability are paramount. The combination of 5-40 UNC coarse threading with Class 3A thread fit provides superior vibration resistance in machinery, electronic enclosures, and automotive assemblies. The passivated finish enhances surface durability while maintaining electrical conductivity, making these hex drive screws ideal for precision equipment requiring repeated maintenance access. With their 82° countersink angle and fully threaded design, they ensure flush mounting in thin materials while distributing clamping force evenly across the fastened joint.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 standards with Class 3A thread fit precision and UNC coarse thread spacing. The 5-40 thread size features a 0.125" major diameter with right-hand threading direction. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures safe use across global markets. Mechanical properties include verified 70,000 psi tensile strength and Rockwell B55 hardness for consistent performance in industrial fastening applications.
