S-98164A527 5/16"-18 x 1 3/8" 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 316 stainless steel construction, ideal for harsh environments and chemical exposure
- Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing performance
- Precision thread engagement with Class 3A fit ensuring secure fastening and reduced risk of cross-threading
- Enhanced durability and surface protection through passivated finish, extending service life in demanding conditions
- Efficient installation and removal with 3/16" hex drive and rounded button head design for easy tool access and a clean finish
- Versatile coarse threading (UNC) providing quick assembly and strong holding power in various materials
- Full thread coverage along the 1 3/8" length for maximum grip and adjustability in applications
Professional Applications & Engineering Value
This 316 stainless steel rounded head screw is engineered to address critical challenges in industrial and marine settings where corrosion, high stress, and regulatory compliance are paramount. The passivated finish significantly enhances the innate corrosion resistance of 316 stainless steel, making it a top choice for chemical processing equipment, offshore platforms, and food-grade machinery. Its Class 3A thread fit and UNC coarse threading ensure vibration resistance and reliable performance in high-vibration assemblies. The combination of 70,000 psi tensile strength and the low-profile button head with a hex drive provides a robust fastening solution that is both strong and easy to install in confined spaces, reducing assembly time and improving operational efficiency.
Specification Summary & Compliance
This screw adheres to ASME B18.3 dimensional standards and features a Class 3A thread fit for precision. It is manufactured from 316 Stainless Steel with a passivated finish, is fully threaded, and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.
