S-92196A302 4-40 x 1 1/4" 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 tensile strength rated at 70,000 psi, ensuring secure fastening under high-stress industrial conditions
- Precise Class 3A thread fit for tighter tolerances and reliable engagement in demanding applications
- Durable Rockwell B70 hardness providing excellent wear resistance and reduced thread deformation
- Optimized partially threaded design with 3/4" minimum thread length for controlled clamping force and vibration resistance
- Standard hex socket drive (3/32") allowing for high-torque installation and compact assembly spaces
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These 4-40 UNC thread socket head cap screws deliver critical performance in precision assemblies where corrosion resistance and mechanical strength are paramount. The 18-8 stainless steel material ensures longevity in moist or chemically aggressive environments, while the Class 3A thread fit and coarse UNC thread provide rapid assembly with minimal cross-threading risk. Engineers specify these partially threaded screws for machinery, enclosures, and instrumentation to achieve reliable clamp load without protrusion. The hex socket drive accommodates high torque in confined spaces, making them ideal for industrial maintenance, automotive subsystems, and electronic chassis where vibration resistance and ASME B18.3 compliance are required.
Specification Summary & Compliance
This socket head cap screw features a 4-40 UNC coarse thread with Class 3A fit for precision assembly, manufactured to ASME B18.3 dimensional standards. The partially threaded design includes a 3/4" minimum thread length on a 1-1/4" overall length. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring suitability for regulated industrial and electronic applications.
