S-90346A111 4-40 x 5/16" ASME B18.3 High-Strength 316 Stainless Steel Socket Head Screws
High-Strength 316 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 316 stainless steel construction, ideal for harsh chemical and marine environments
- Exceptional mechanical strength offering 110,000 psi tensile strength and Rockwell C25 hardness for reliable load-bearing performance
- Precise thread engagement with Class 3A fit and 4-40 UNC coarse threads, ensuring secure fastening and vibration resistance
- Optimized drive efficiency featuring a standard socket head with 3/32" hex drive for high torque application and reduced stripping risk
- Enhanced durability through cold working fabrication, improving fatigue resistance and structural integrity
- Full thread coverage along the 5/16" length, providing maximum grip and adjustability in assembled components
- Regulatory compliance meeting ASME B18.3 standards, RoHS 3, and REACH, ensuring safety and environmental responsibility
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these 316 stainless steel socket head cap screws deliver critical performance where corrosion resistance and high tensile strength are paramount. The 4-40 UNC coarse threads with Class 3A precision fit minimize loosening under dynamic loads, making them ideal for machinery, automotive assemblies, and electronic enclosures exposed to moisture or chemicals. The cold worked manufacturing enhances grain structure, providing consistent 110,000 psi tensile strength and Rockwell C25 hardness to withstand repetitive stress. With a 3/32" hex drive and standard socket head profile, installation is streamlined in confined spaces, reducing assembly time while maintaining ASME B18.3 compliance for interoperability.
Specification Summary & Compliance
This socket head cap screw adheres to Class 3A thread fit tolerances per UNC standards, with a 4-40 thread size, 5/16" length, and fully threaded design. Manufacturing follows ASME B18.3 specifications, ensuring dimensional accuracy and reliability. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to hazardous substance restrictions and environmental safety protocols.
