S-91255A720 1/2"-13 x 2" ASTM F835 Steel Button Head Hex-Drive Screws
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 load-bearing capacity with 120,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance through black-oxide coating that protects against rust and extends service life
- Precise thread engagement with Class 3A fit ensuring secure fastening and vibration resistance
- Optimized drive efficiency featuring 5/16" hex drive for high-torque installation without stripping
- Enhanced durability from Rockwell C39 hardness that maintains structural integrity under stress
- Full-threaded design providing consistent holding power along the entire 2" length
- Regulatory compliance meeting ASME B18.3, ASTM F835, RoHS 3, and REACH standards for quality assurance
Professional Applications & Engineering Value
These black-oxide alloy steel button head screws deliver critical performance advantages for industrial assemblies requiring both high tensile strength and corrosion resistance. The combination of 1/2"-13 UNC coarse threading and Class 3A thread fit ensures rapid installation with exceptional vibration resistance, making them ideal for heavy machinery, structural frameworks, and equipment subjected to dynamic loads. The rounded button head profile provides a low-profile finish that minimizes snagging while the fully threaded design distributes clamping force evenly across the entire fastener length. Engineered to withstand harsh environments, these hex drive screws maintain their mechanical properties in demanding applications where fastener failure is not an option.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit and UNC coarse threading specifications. Complies with ASME B18.3 for dimensional requirements and ASTM F835 for mechanical properties. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards. The black-oxide surface treatment provides consistent corrosion protection while maintaining the alloy steel's 120,000 psi tensile strength and Rockwell C39 hardness characteristics.
