S-92949A444 5/16"-18 x 5" 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
- Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
- Precise Class 3A thread fit provides superior engagement and reduces the risk of cross-threading during installation
- Fully threaded design offers maximum grip length and consistent holding power across the entire fastener
- Hex drive compatibility allows for high-torque installation with standard tools while preventing cam-out
- Coarse UNC threading enables faster installation and better performance in softer materials
- Rounded button head profile provides a low-profile, finished appearance while minimizing snagging hazards
Professional Applications & Engineering Value
These 18-8 stainless steel rounded head screws with 5/16"-18 UNC coarse threading deliver exceptional performance in demanding industrial environments. The combination of 70,000 psi tensile strength and fully threaded design ensures maximum load distribution and vibration resistance, making them ideal for machinery assembly, structural frameworks, and heavy equipment applications. The passivated finish significantly enhances corrosion resistance, extending service life in moisture-prone or chemical-exposed settings. The hex drive configuration allows for precise torque application during installation, while the rounded button head provides a clean, low-profile finish that reduces workplace snagging hazards and improves safety.
Specification Summary & Compliance
This 5/16"-18 UNC x 5" fastener features Class 3A thread fit precision and complies with ASME B18.3 manufacturing specifications. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring environmental safety and regulatory adherence. Manufactured from 18-8 stainless steel with passivated surface treatment, these screws maintain dimensional accuracy and mechanical properties required for critical industrial fastening applications.
