S-98164A467 1/4"-20 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 and passivated finish, ideal for harsh environments and chemical exposure
- Exceptional mechanical strength delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under heavy loads
- Precise thread engagement with Class 3A UNC coarse threads ensuring secure, vibration-resistant fastening in demanding applications
- Efficient installation and removal via 5/32" hex drive, providing excellent torque transmission and reduced tool slippage
- Full threading along the 4" length offers maximum grip and adjustability across the entire fastener for versatile mounting scenarios
- Rounded button head design combines a low-profile appearance with smooth surface contact, minimizing snagging and improving safety
- Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH for assured quality and environmental responsibility
Professional Applications & Engineering Value
Engineered for demanding industrial environments, this 316 stainless steel rounded head screw addresses critical challenges like corrosion, high stress, and regulatory compliance. Its passivated finish significantly enhances resistance to oxidants and chlorides, making it suitable for marine, chemical processing, and food-grade applications. The UNC coarse thread and Class 3A thread fit provide superior holding power in soft materials and reduce cross-threading risks during assembly. With a fully threaded 4" length and hex drive, it ensures consistent clamping force and easy installation in confined spaces, delivering long-term reliability where fastener failure is not an option.
Specification Summary & Compliance
This screw meets ASME B18.3 specifications with a 1/4"-20 UNC thread and Class 3A thread fit for precise dimensional accuracy. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. Manufactured from 316 stainless steel with a passivated finish, it maintains a tensile strength of 70,000 psi and Rockwell B55 hardness for consistent performance in industrial fastening applications.
