S-91255A818 12-24 x 1" 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 industrial applications, reducing failure risks.
- Class 3A thread fit provides superior precision and tighter tolerances for secure, vibration-resistant fastening in critical assemblies.
- Black-oxide coating on alloy steel enhances corrosion resistance and durability, extending service life in demanding environments.
- Fully threaded design allows for maximum grip and uniform load distribution along the entire length, improving joint integrity.
- Hex drive compatibility (9/64") enables easy installation and removal with standard tools, reducing assembly time and labor costs.
- Coarse UNC threads facilitate quick engagement and are less prone to cross-threading, ideal for rapid production lines.
- Compliance with ASME B18.3 and ASTM F835 ensures consistent quality and interoperability, meeting rigorous industry standards.
Professional Applications & Engineering Value
These 12-24 UNC coarse thread screws are engineered to address common industrial challenges such as vibration loosening and material fatigue. The black-oxide alloy steel construction provides excellent resistance to rust and wear, making them suitable for machinery, automotive, and heavy equipment applications where exposure to harsh conditions is frequent. The rounded head style with a hex drive offers a low-profile, secure fit that minimizes protrusion and allows for efficient torque application. With a Rockwell C39 hardness and fully threaded design, they ensure consistent clamping force and durability, reducing maintenance needs and downtime in industrial screw assemblies.
Specification Summary & Compliance
This screw features a Class 3A thread fit with UNC coarse threads for precise engagement, adhering to ASME B18.3 and ASTM F835 manufacturing standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material sustainability in industrial use.
