S-92949A131 5-40 x 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 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
- Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-lasting fastening.
- Precise thread engagement with Class 3A fit and UNC coarse threads, ensuring secure installations and reduced cross-threading risks.
- Efficient installation and removal via the 5/64" hex drive, providing a secure tool grip and minimizing slippage.
- Versatile rounded (button) head design for a low-profile, finished appearance while distributing clamp load effectively.
- Full threading along the 1/4" length for maximum grip and adjustability in various material thicknesses.
- Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
Professional Applications & Engineering Value
This 5-40 UNC thread rounded head screw is engineered to address critical assembly challenges in demanding sectors. The 18-8 stainless steel material, enhanced by a passivated finish, provides excellent resistance to oxidation and chemical exposure, making it suitable for electronics, machinery, and outdoor equipment. The coarse UNC thread and Class 3A fit facilitate quick, reliable fastening in metals and plastics, reducing assembly time and preventing loosening under vibration. With a hex drive design, it ensures high torque transmission without cam-out, supporting efficient maintenance and disassembly. These screws are ideal for applications where high tensile strength and regulatory compliance are paramount, such as in automotive subassemblies, industrial controls, and consumer durable goods.
Specification Summary & Compliance
This screw features a 5-40 UNC coarse thread with Class 3A precision fit, ensuring tight tolerances and consistent performance. It is manufactured in accordance with ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.
