S-90909A218 1/2"-13 x 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 316 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under heavy loads
- Precise thread engagement with Class 3A thread fit ensuring secure fastening and vibration resistance
- Efficient installation with 5/16" hex drive providing high torque capability and reduced tool slippage
- Enhanced load distribution through flanged design and wide rounded button head profile
- Full thread coverage along the 3" length for maximum grip and adjustment flexibility
- Regulatory compliance with RoHS 3 and REACH standards for environmentally responsible manufacturing
Professional Applications & Engineering Value
This 316 stainless steel rounded head screw delivers critical performance advantages in demanding applications where corrosion resistance and structural integrity are paramount. The combination of UNC coarse threading and Class 3A thread fit ensures reliable engagement in various materials while resisting loosening under vibration. The passivated finish significantly enhances the natural corrosion resistance of 316 stainless steel, making it suitable for marine, chemical processing, and food industry applications. The flanged design with wide button head profile distributes clamping force effectively, reducing surface damage and providing superior sealing capability. With fully threaded construction and 5/16" hex drive, installation efficiency is maximized while maintaining the high tensile strength required for structural fastening applications.
Specification Summary & Compliance
This heavy-duty fastener features 1/2"-13 UNC coarse threads with Class 3A thread fit precision, ensuring tight tolerances for secure fastening. The screw maintains dimensional accuracy with a 3" length, 0.5" thread diameter, and 1.156" flange diameter. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the product's adherence to international standards for hazardous substance restrictions and chemical safety.
