S-92210A597 5/16"-18 x 3 1/2" 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 with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Exceptional tensile strength rated at 70,000 psi for reliable performance in demanding applications
- Precision Class 3A thread fit ensures secure, vibration-resistant connections with minimal backlash
- Optimized drive engagement with hex drive design for maximum torque transmission and reduced stripping risk
- Full threading capability provides consistent clamping force along the entire 3½" length
- Standard 82° countersink angle enables flush mounting for clean, professional installations
- Rockwell B55 hardness maintains thread integrity and prevents deformation under load
Professional Applications & Engineering Value
This 18-8 stainless steel flat head screw delivers critical performance advantages for industrial applications where corrosion resistance and structural integrity are paramount. The combination of 5/16"-18 UNC coarse threading with Class 3A precision fit ensures rapid installation while maintaining vibration resistance in machinery, structural frameworks, and heavy equipment. The passivated finish significantly enhances the natural corrosion resistance of stainless steel, making these flat head screws ideal for chemical processing, marine environments, and outdoor applications. The hex drive design provides superior torque transmission compared to slotted drives, reducing installation time and preventing fastener damage. With full threading along the entire 3½" length, engineers achieve consistent clamping force distribution across joined materials, eliminating weak points in critical assemblies.
Specification Summary & Compliance
Manufactured to exacting ASME B18.3 specifications with Class 3A thread fit precision and UNC coarse thread profile. Features include 5/16"-18 thread size, 3½" length, 82° countersink angle, and Rockwell B55 hardness. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industries and applications.
