S-98164A464 1/4"-20 x 2 1/4" 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 and passivated finish, ideal for harsh industrial environments
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing performance
- Precise thread engagement with Class 3A UNC coarse threads ensuring secure fastening and vibration resistance
- Efficient installation featuring hex drive (5/32") and rounded button head design for easy tool access and reduced surface protrusion
- Full threading coverage along the 2 1/4" length provides maximum grip and uniform stress distribution
- Regulatory compliance meeting ASME B18.3 standards and environmental regulations (RoHS 3 & REACH) for global supply chain compatibility
- Right-hand coarse threading delivers quick assembly and disassembly in high-vibration applications
Professional Applications & Engineering Value
These 316 stainless steel rounded head screws deliver critical performance in demanding environments where corrosion resistance and mechanical reliability are paramount. The combination of Class 3A UNC coarse threading and fully threaded design ensures maximum thread engagement in soft materials and thin sheets, preventing stripping and maintaining clamp force under vibration. The passivated finish enhances the natural corrosion resistance of 316 stainless steel, making these hex drive screws ideal for chemical processing, marine equipment, and food processing applications where exposure to moisture and aggressive chemicals is common. With their rounded button head profile, they provide a finished appearance while minimizing snagging hazards in machinery and equipment assemblies.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision tolerance. Features 1/4"-20 UNC coarse threads with right-hand direction and full threading along the 2 1/4" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for international industrial supply chains.
