S-91255A706 1/2"-13 x 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 tensile strength of 120,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance from the Black-Oxide finish on Alloy Steel extends service life in harsh industrial environments.
- Precise Class 3A thread fit provides secure, vibration-resistant connections, minimizing loosening in dynamic loads.
- High hardness (Rockwell C39) enhances wear resistance, maintaining thread integrity through repeated use.
- 5/16" hex drive design allows for easy installation and high torque application with standard tools.
- Fully threaded UNC coarse spacing enables quick assembly and strong holding power in various materials.
- Compliance with ASME B18.3 and ASTM F835 guarantees consistent quality and interchangeability for engineering projects.
Professional Applications & Engineering Value
Engineered for demanding environments, these Black-Oxide Alloy Steel Rounded Head Screws address critical industrial challenges such as vibration-induced loosening and corrosion. The 1/2"-13 UNC coarse thread and Class 3A fit ensure rapid, secure fastening in heavy machinery, structural assemblies, and automotive systems, where high tensile strength and durability are paramount. The button head style with a rounded profile offers a low-profile, flush finish, reducing snag risks while the hex drive facilitates efficient installation in confined spaces. Ideal for applications requiring RoHS and REACH compliance, these screws provide long-term reliability in corrosive or regulated settings, minimizing maintenance downtime and replacement costs.
Specification Summary & Compliance
This screw features precise Class 3A thread fit per UNC standards, with a coarse thread spacing for robust engagement. Manufacturing adheres to ASME B18.3 and ASTM F835 specifications, ensuring dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting use in environmentally sensitive and global industrial markets.
