S-98164A272 5/16"-18 x 1 1/4" 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 thanks to 316 stainless steel construction, ideal for harsh chemical and marine environments
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under high stress
- Precise, secure fastening ensured by Class 3A thread fit and UNC coarse threading, reducing the risk of cross-threading
- Enhanced durability and longevity from the passivated finish, which improves corrosion resistance and minimizes surface wear
- Easy installation and removal with a 3/16" hex drive, providing a positive grip and reducing tool slippage
- Versatile rounded button head design offers a low-profile, finished appearance while distributing clamping force effectively
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental standards are met
Professional Applications & Engineering Value
These 316 stainless steel rounded head screws are engineered to address critical challenges in demanding industrial settings. The UNC coarse thread and Class 3A thread fit provide superior holding power and vibration resistance, making them ideal for machinery, structural assemblies, and equipment exposed to dynamic loads. The passivated finish significantly enhances the innate corrosion resistance of 316 stainless steel, protecting against chlorides and acidic environments common in chemical processing, marine, and food industry applications. The combination of 70,000 psi tensile strength and the rounded button head design ensures a reliable, flush-mount fastening solution that withstands extreme conditions without compromising on a clean, professional finish.
Specification Summary & Compliance
This product features a 5/16"-18 UNC thread with a Class 3A precision fit for high-strength applications. Manufacturing and dimensional specifications conform to ASME B18.3. The screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they are free from hazardous substances and safe for use in regulated markets.
