S-91255A048 7/16"-14 x 1 1/2" ASTM F835 Steel Button Head Hex-Drive Screws

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 extends service life in harsh industrial environments, minimizing maintenance needs.
• Precise Class 3A thread fit provides secure, vibration-resistant connections, enhancing assembly integrity and reducing loosening over time.
• Hex drive design allows for easy installation and high torque application, speeding up assembly processes and improving worker efficiency.
• Fully threaded coarse UNC design enables quick engagement and strong holding power, ideal for rapid production and heavy-duty fastening.
• Durable alloy steel construction with Rockwell C39 hardness offers excellent wear resistance, ensuring long-term durability under repetitive use.
• Rounded button head profile reduces surface protrusion and improves safety, making it suitable for applications where a low-profile finish is desired.

Professional Applications & Engineering Value

This 7/16"-14 UNC hex drive rounded head screw is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in demanding environments. The black-oxide alloy steel material provides a robust barrier against moisture and chemicals, extending the fastener's lifespan in outdoor or chemically exposed settings. Its coarse thread and Class 3A fit ensure quick, secure fastening in materials like metal and thick plastics, reducing assembly time while maintaining joint integrity. Ideal for machinery, automotive, and structural applications, this screw combines high tensile strength with a low-profile rounded head, offering both performance and safety in tight spaces. By meeting strict standards, it delivers consistent reliability for engineers and procurement specialists seeking durable, compliant fastening solutions.

Specification Summary & Compliance

This screw features precise inch system measurements with a Class 3A thread fit per UNC standards, ensuring tight tolerances for secure fastening. It complies with ASME B18.3 and ASTM F835 specifications, guaranteeing manufacturing consistency and performance. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for hazardous substances.