S-97654A343 4-40 x 1/2" Stainless Steel Flanged Button Head Hex-Drive Screws
Stainless Steel Flanged Button Head Hex-Drive 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
- Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish for long-term reliability in harsh environments
- Superior thread engagement with Class 3A UNC coarse threads ensuring precise, vibration-resistant fastening in industrial applications
- High mechanical strength delivering 70,000 psi tensile strength and Rockwell B70 hardness for demanding load-bearing applications
- Enhanced installation efficiency through the 1/16" hex drive and wide button head profile for secure tool engagement and reduced slipping
- Integrated flange design eliminates the need for separate washers, providing increased bearing surface and simplified assembly
- Full threading capability allows maximum grip length and adjustment flexibility across various material thicknesses
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
Professional Applications & Engineering Value
These 4-40 UNC threaded screws with Class 3A fit provide engineering-grade solutions for precision assembly challenges. The 18-8 stainless steel construction combined with passivated finish delivers exceptional corrosion resistance in demanding environments including marine, chemical processing, and food equipment applications. The flanged button head design with hex drive offers superior clamping force distribution while preventing surface damage during installation. With 70,000 psi tensile strength and Rockwell B70 hardness, these fully threaded screws maintain integrity under vibration and thermal cycling, making them ideal for electronic enclosures, machinery guards, and precision instrumentation where reliability is critical.
Specification Summary & Compliance
This 1/2" length screw features 4-40 UNC coarse threads with Class 3A thread fit for precision tolerance. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations. The right-hand threaded design with 0.234" flange diameter and fully threaded construction ensures consistent performance across industrial applications.
