S-90585A857 5/8"-11 x 4" 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 through 316 stainless steel construction and passivated finish, ideal for harsh environments and chemical exposure
- Exceptional tensile strength rated at 70,000 psi with Rockwell B55 hardness for reliable performance in high-stress applications
- Precise Class 3A thread fit ensures secure fastening with minimal backlash and consistent engagement in mating components
- Optimized drive efficiency with 3/8" hex drive providing maximum torque transfer and reduced tool slippage
- Full threading along 4" length delivers complete engagement capability for versatile installation depths
- Standard 82° countersink angle enables flush mounting in prepared surfaces for clean, professional finishes
- Regulatory compliance assurance meeting ASME B18.3 specifications plus RoHS and REACH environmental standards
Professional Applications & Engineering Value
These 316 stainless steel flat head screws deliver critical performance where corrosion resistance and structural integrity are paramount. The combination of UNC coarse threading and Class 3A fit provides rapid installation with vibration resistance in heavy machinery, marine equipment, and chemical processing systems. The passivated finish enhances the natural corrosion resistance of 316 stainless, making these fully threaded screws ideal for permanent installations in aggressive environments. With their 82° countersink profile and hex drive design, they offer flush mounting capabilities while accommodating high torque applications. These features make them particularly valuable in structural assemblies, piping systems, and industrial equipment where reliable fastening solutions must withstand both mechanical stress and environmental challenges.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit tolerance for precision engagement. Features 5/8"-11 UNC coarse threads with right-hand direction and standard flat head profile. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The 4" length provides full threading capability while maintaining dimensional consistency across production lots.
