S-98164A698 5/16"-18 x 4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel 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, ideal for harsh chemical and marine environments
- Enhanced thread engagement through Class 3A thread fit precision, ensuring reliable fastening in critical applications
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty load requirements
- Optimized installation efficiency featuring a hex drive design for secure tool engagement and reduced slippage
- Extended service life thanks to passivated surface treatment that improves corrosion resistance and durability
- Full-threaded design providing consistent clamping force along the entire 4" length for versatile applications
- Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH
Professional Applications & Engineering Value
This 316 stainless steel rounded head screw delivers exceptional performance in demanding industrial settings where corrosion resistance and mechanical reliability are paramount. The combination of UNC coarse threading and Class 3A thread fit ensures rapid installation and vibration resistance in structural applications, while the passivated finish provides an additional protective layer against chemical exposure and atmospheric corrosion. Engineered with fully threaded design and hex drive compatibility, this fastener solves critical challenges in marine equipment, chemical processing plants, and food processing machinery where frequent washdowns and exposure to corrosive elements require durable, maintenance-free fastening solutions that maintain integrity under continuous stress.
Specification Summary & Compliance
This fastener features precision 5/16"-18 UNC coarse threads with Class 3A thread fit tolerance for superior engagement. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy and performance standards. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting current environmental regulations for hazardous substance restrictions.
