S-92949A865 5/16"-24 x 3 1/2" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel Button Head Hex-Drive 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
- Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- High tensile strength of 70,000 psi ensures reliable, long-lasting fastening in demanding applications
- Precise Class 3A thread fit provides superior engagement and vibration resistance in fine-threaded assemblies
- Hex drive design with 3/16" drive size allows for easy installation and high torque application without slippage
- Fully threaded UNF configuration delivers maximum grip length and uniform load distribution
- Rounded button head profile offers a low-profile, aesthetically pleasing finish while reducing snag hazards
- Compliance with ASME B18.3, RoHS 3, and REACH guarantees material safety and adherence to international engineering standards
Professional Applications & Engineering Value
Engineered for high-performance industrial applications, this 18-8 stainless steel rounded head screw addresses critical challenges in machinery, automotive, and structural assemblies where corrosion resistance and vibration stability are paramount. The passivated finish enhances surface durability against chemical exposure and moisture, while the fine UNF threads with Class 3A fit ensure tight sealing and minimal loosening under dynamic loads. Its fully threaded design and hex drive facilitate quick installation in confined spaces, making it an optimal choice for heavy-duty fastening solutions that require consistent performance and regulatory compliance.
Specification Summary & Compliance
This screw features a 5/16"-24 UNF fine thread with Class 3A thread fit for precise dimensional accuracy, and is manufactured to meet ASME B18.3 specifications (referencing ASTM F879). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity. The Rockwell B55 hardness and 70,000 psi tensile strength further validate its suitability for rigorous engineering standards.
