S-98164A524 5/16"-18 x 5/8" ASME B18.3, ASTM F879 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 durability and wear resistance from passivated surface finish, extending service life in demanding applications
- Precise, reliable fastening with Class 3A thread fit ensuring tight tolerances and vibration resistance
- High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty mechanical loads
- Quick installation and removal using standard 3/16" hex drive, reducing assembly time and tool requirements
- Full-thread engagement along the entire 5/8" length for maximum holding power and load distribution
- Industry compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for quality and safety
Professional Applications & Engineering Value
These 316 stainless steel rounded head screws deliver exceptional performance in corrosive and high-stress environments where standard fasteners fail. The combination of UNC coarse threading and Class 3A thread fit provides superior vibration resistance in machinery, automotive, and marine applications. The passivated finish enhances the natural corrosion resistance of 316 stainless steel, making these hex drive screws ideal for chemical processing equipment, offshore platforms, and food processing machinery where moisture and aggressive chemicals are present. The fully threaded design ensures maximum grip length and load distribution, while the rounded button head provides a clean, low-profile appearance with reduced snagging hazards in assembled products.
Specification Summary & Compliance
This 5/16"-18 UNC x 5/8" screw features precision Class 3A thread fit with coarse threading for optimal engagement. Manufactured to ASME B18.3 specifications where applicable per ASTM F879, ensuring dimensional accuracy and performance consistency. Fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, verified against the latest SVHC list as of June 2023.
