S-92198A556 1/4"-20 x 3 1/2" 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 with 18-8 stainless steel construction, ideal for harsh industrial environments and outdoor applications.
- High tensile strength of 80,000 psi provides reliable load-bearing capacity and prevents joint failure under stress.
- Rockwell B70 hardness ensures excellent wear resistance and maintains thread integrity during repeated installations.
- External hex drive and hex head design allows for easy installation and high torque application with standard tools.
- Coarse UNC thread with Class 2A fit offers quick assembly and reliable engagement in various materials.
- Partially threaded shank provides unthreaded grip length for precise clamping and vibration resistance.
- Compliance with ASME B18.2.1, RoHS 3, and REACH guarantees consistent quality and safety for regulated industries.
Professional Applications & Engineering Value
This 18-8 stainless steel hex head screw is engineered to address critical challenges in industrial assembly and heavy-duty construction. The 1/4"-20 UNC coarse thread ensures rapid installation and secure fastening in metals, plastics, and composite materials, reducing assembly time. With a 3 1/2" length and 3/4" minimum thread engagement, it provides optimal grip in thick materials, preventing loosening from vibrations. The external hex drive facilitates high-torque applications, making it suitable for machinery, structural frameworks, and equipment requiring robust, corrosion-resistant fasteners. Its partially threaded design concentrates clamping force, enhancing joint stability in dynamic load conditions.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit per UNC standards, ensuring consistent engagement and interchangeability. Manufactured to ASME B18.2.1 specifications, it meets dimensional and mechanical requirements for reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of hazardous substances and safe for various industrial and commercial applications.
