S-92198A368 3/8"-24 x 4 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 thanks to 18-8 stainless steel construction, ideal for harsh industrial environments
- Exceptional tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration
- Precise Class 2A thread fit provides smooth assembly and consistent clamping force in UNF fine thread applications
- External hex drive design allows for high-torque installation with standard tools, reducing assembly time
- Partially threaded shank offers optimal grip length for secure fastening while minimizing thread damage
- Rockwell B70 hardness maintains thread integrity and prevents stripping during repeated use
- Full regulatory compliance with ASME B18.2.1, RoHS 3, and REACH standards for global industrial acceptance
Professional Applications & Engineering Value
These 18-8 stainless steel hex head screws deliver critical performance in demanding applications where corrosion resistance and mechanical strength are paramount. The UNF fine thread configuration (3/8"-24) provides superior vibration resistance compared to coarse threads, making them ideal for machinery, equipment manufacturing, and structural assemblies subjected to dynamic loads. The partially threaded design concentrates clamping force precisely where needed, preventing joint loosening while the external hex drive accommodates high installation torque without cam-out. With 80,000 psi tensile strength and Rockwell B70 hardness, these fasteners maintain integrity in high-stress environments including marine, chemical processing, and heavy equipment applications where fastener failure is not an option.
Specification Summary & Compliance
This 4 1/2" hex head screw features precise Class 2A thread fit with UNF fine threading (3/8"-24) and minimum 1" thread length. Manufactured to ASME B18.2.1 dimensional standards with Rockwell B70 hardness and 80,000 psi tensile strength. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for use in restricted substance-sensitive applications.
