S-92196A122 4-40 x 2 1/2" ASME B18.3 18-8 Stainless Steel Socket Head Screws
18-8 Stainless Steel Socket 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 environments and long-term reliability
- Exceptional mechanical strength with 70,000 PSI tensile strength and Rockwell B70 hardness for demanding applications
- Precise Class 3A thread fit ensures secure, vibration-resistant fastening and reduced risk of cross-threading
- Partially threaded design provides optimal grip and clamping force control in assembled components
- Standard hex socket drive (3/32") allows for high-torque installation with common tools, minimizing stripping
- Coarse UNC thread pattern enables quick assembly and disassembly, improving maintenance efficiency
- Full compliance with ASME B18.3 guarantees dimensional accuracy and interchangeability in industrial systems
Professional Applications & Engineering Value
This 4-40 UNC Socket Head Cap Screw delivers critical performance in precision machinery, automotive assemblies, and electronic enclosures where vibration resistance and corrosion protection are paramount. The 18-8 stainless steel material withstands exposure to moisture, chemicals, and temperature variations, preventing fastener failure in critical joints. Its partially threaded configuration concentrates clamping force exactly where needed, reducing stress concentration and improving fatigue life. The Class 3A thread fit and coarse UNC threading ensure rapid, reliable installation even in blind holes or tight spaces, streamlining production and maintenance workflows while meeting rigorous industrial fastener standards.
Specification Summary & Compliance
This socket head cap screw features a 2-1/2" length with 3/4" minimum thread length, manufactured to ASME B18.3 specifications for dimensional consistency. The UNC coarse thread maintains Class 3A tolerance for precise fit, while the 3/32" hex drive ensures compatibility with standard tools. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial and electronic applications.
