S-97654A647 4-40 x 3/4" ASME B18.3 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
- Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
- Enhanced load distribution from the integrated flange design, preventing surface damage and improving joint integrity
- High tensile strength of 70,000 psi ensures reliable performance under heavy mechanical stress
- Precise Class 3A thread fit provides secure, vibration-resistant fastening in critical applications
- Easy installation and removal with 1/16" hex drive, reducing assembly time and tool slippage
- Wide button head design offers a low-profile, finished appearance while increasing clamping surface area
- Full threading along the 3/4" length allows for maximum grip and adjustability in various material thicknesses
Professional Applications & Engineering Value
This 4-40 UNC flanged rounded head screw is engineered to address common industrial fastening challenges, including vibration loosening and corrosion-induced failure. The 18-8 Stainless Steel material provides excellent resistance to rust and chemical exposure, making it suitable for outdoor equipment, marine hardware, and food processing machinery. The coarse thread spacing and Class 3A thread fit ensure quick assembly and a tight, secure hold in metals and plastics, reducing maintenance needs. The flange eliminates the need for separate washers, streamlining inventory and installation in automotive assemblies, electronic enclosures, and heavy-duty machinery where reliability is critical.
Specification Summary & Compliance
This screw adheres to ASME B18.3 dimensional standards, with precise Class 3A thread fit for consistent performance. It features a right-hand UNC thread with coarse spacing, a 0.234" flange diameter, and is fully threaded along its 3/4" length. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial supply chains.
