S-91306A288 5/16"-18 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 corrosion resistance with zinc plating, extending service life in harsh industrial environments
- Superior tensile strength of 120,000 psi ensures reliable performance under heavy loads and vibration
- Class 3A thread fit provides precise, secure fastening with minimal risk of loosening
- Fully threaded UNC coarse spacing delivers faster installation and enhanced holding power in various materials
- Hex drive design allows for high-torque application with standard tools, reducing assembly time
- Rockwell C39 hardness offers excellent wear resistance and durability in demanding applications
- Compliance with ASME B18.3 and ASTM F835 guarantees consistent quality and engineering reliability
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these zinc-plated alloy steel screws address critical challenges in machinery assembly, structural frameworks, and equipment manufacturing. The fully threaded UNC coarse spacing ensures rapid installation and robust clamping force, reducing the risk of strip-out in soft materials. With a high tensile strength of 120,000 psi and Rockwell C39 hardness, they withstand extreme stress and repetitive loads, making them ideal for construction, automotive, and aerospace sectors. The rounded button head provides a low-profile finish, minimizing protrusion while maintaining secure fastening. Compliant with ASME B18.3 and ASTM F835, these screws deliver consistent performance and long-term reliability in corrosive or high-vibration environments.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC thread with Class 3A fit, ensuring precise dimensional accuracy and secure engagement. Manufactured to ASME B18.3 and ASTM F835 specifications, it guarantees uniformity and reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and usage in global markets.
