S-92198A700 5/16"-18 x 4 1/4" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws
18-8 Stainless Steel Hex Head 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 thanks to 18-8 Stainless Steel construction, ideal for harsh or outdoor environments.
- Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B70 hardness for reliable performance under high stress.
- Secure and efficient installation enabled by the external hex drive and hex head design, allowing for high torque application.
- Optimized for quick assembly with a coarse UNC thread and Class 2A thread fit, reducing the risk of cross-threading.
- Versatile partial threading provides an unthreaded shank for precise clamping and shear strength where needed.
- Compliance with major industry standards including ASME B18.2.1, ensuring dimensional consistency and interchangeability.
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting strict regulatory requirements.
Professional Applications & Engineering Value
This 5/16"-18 UNC Hex Head Screw is engineered to solve critical fastening challenges in demanding industrial applications. The 18-8 Stainless Steel material provides excellent resistance to corrosion and oxidation, making it suitable for machinery, structural assemblies, and marine equipment exposed to moisture and chemicals. Its partially threaded design offers a non-threaded bearing surface that increases resistance to shear forces and vibration loosening, a common failure point in dynamic loads. The coarse thread and Class 2A fit ensure rapid installation and reliable engagement in a variety of materials, from steel to castings. Combined with an 80,000 psi tensile strength, this screw delivers dependable, long-term performance in heavy-duty fastening scenarios where failure is not an option.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC thread with a Class 2A thread fit, ensuring standard dimensional accuracy and interchangeability. It is manufactured in accordance with ASME B18.2.1 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.
