S-90316A211 4-40 x 1/4" ASME B18.6.3 Stainless Steel Flanged Hex Head Screws with Slotted Drive
Stainless Steel Flanged Hex Head Screws with Slotted Drive
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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 for long-lasting performance in harsh environments
- Exceptional mechanical strength offering 100,000 psi tensile strength and Rockwell B100 hardness for heavy-duty applications
- Reliable thread engagement with Class 2A thread fit ensuring consistent fastening and vibration resistance
- Enhanced load distribution through integrated flange design that eliminates the need for separate washers
- Quick installation capability with external hex/slotted drive providing multiple tooling options
- Industry-standard compatibility with UNC coarse threading meeting ASME B18.6.3 specifications
- Environmental compliance assurance with RoHS 3 and REACH compliance for global manufacturing requirements
Professional Applications & Engineering Value
This 4-40 UNC hex head screw delivers critical engineering solutions for industrial applications where corrosion resistance and mechanical integrity are paramount. The 18-8 stainless steel composition provides excellent protection against rust and chemical exposure, making it ideal for marine, food processing, and outdoor equipment applications. The fully threaded design with coarse thread spacing ensures maximum holding power in various materials, while the flanged head distributes clamping force evenly, preventing surface damage and reducing assembly time. The combination of 100,000 psi tensile strength and Rockwell B100 hardness makes these industrial hex screws suitable for high-stress applications in machinery, electronics, and automotive assemblies where vibration resistance and long-term reliability are essential.
Specification Summary & Compliance
This 4-40 UNC hex head screw features precise Class 2A thread fit according to ASME B18.6.3 standards, ensuring dimensional accuracy and interchangeability. The inch-system fasteners maintain UNC thread type with coarse thread spacing for optimal performance in various materials. Manufacturing compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial applications requiring strict material restrictions.
