S-91255A798 5/8"-11 x 1 1/2" 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 high-stress applications
- Superior corrosion resistance through black-oxide coating, extending service life in demanding industrial environments
- Optimized installation efficiency with 3/8" hex drive design providing secure tool engagement and reduced slippage
- Precise thread engagement with Class 3A UNC coarse threads ensuring consistent fastening and vibration resistance
- Enhanced material durability from Rockwell C37 hardness alloy steel, maintaining structural integrity under repeated use
- Full-threaded design offering maximum grip length and uniform stress distribution across the entire fastener
- Regulatory compliance assurance meeting ASME B18.3, ASTM F835, RoHS 3, and REACH standards for global industrial acceptance
Professional Applications & Engineering Value
These black-oxide alloy steel rounded head screws deliver critical performance where high tensile strength and corrosion resistance are paramount. The 5/8"-11 UNC coarse threading provides excellent engagement in both metallic and composite materials, while the Class 3A thread fit ensures precise tolerance control for vibration-prone assemblies. The fully threaded design maximizes clamping force distribution, making them ideal for heavy machinery, structural steel connections, and industrial equipment where 120,000 psi tensile strength prevents joint failure under dynamic loads. The rounded head profile with hex drive compatibility facilitates quick installation in confined spaces, reducing assembly time while maintaining the integrity of critical connections in manufacturing, construction, and automotive applications.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread fit tolerances with UNC coarse threading (5/8"-11) and full compliance with ASME B18.3 and ASTM F835 specifications. The black-oxide alloy steel construction meets Rockwell C37 hardness requirements while maintaining 120,000 psi tensile strength. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, ensuring suitability for regulated industrial markets worldwide.
