S-92210A586 5/16"-18 x 1 3/8" ASME B18.3, ASTM F879 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive Flat 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
- Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
- Superior thread engagement and vibration resistance due to Class 3A thread fit and coarse UNC threading, ensuring reliable, long-term fastening.
- High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications.
- Secure and efficient installation provided by the 3/16" hex drive, allowing for high torque application without slippage.
- Flush mounting capability with the standard 82° flat head profile, creating a smooth surface finish.
- Full threading along the 1-3/8" length for maximum grip and holding power across the entire fastener.
- Guaranteed quality and safety through compliance with ASME B18.3, ASTM F879, RoHS 3, and REACH standards.
Professional Applications & Engineering Value
This 5/16"-18 UNC Flat Head Screw is engineered from 18-8 Stainless Steel to solve critical challenges in industrial assembly. The passivated finish significantly enhances its innate corrosion resistance, making it a durable choice for applications exposed to moisture, chemicals, or outdoor elements. Its Class 3A thread fit and coarse threading provide a precise, secure connection that resists loosening under vibration, a common failure point in machinery and equipment. The combination of high tensile strength and a flat head with hex drive ensures that it can be installed with high torque for a flush, tamper-resistant finish in metal fabrication, automotive, and construction projects, delivering long-term reliability and reducing maintenance needs.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC thread with a Class 3A precision fit, ensuring excellent dimensional accuracy and interchangeability. It is manufactured in accordance with ASME B18.3 and ASTM F879 specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for use in various markets.
