S-91253A796 5/8"-11 x 1 1/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength (130,000 psi) ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Black-oxide coating on alloy steel provides enhanced corrosion resistance, extending service life in demanding industrial environments.
• Class 3A thread fit guarantees precise, secure mating with nuts and tapped holes, minimizing assembly issues and improving joint integrity.
• Fully threaded design with UNC coarse spacing allows for faster installation and superior holding power in a wide range of materials.
• 82° countersink angle and flat head profile enable a flush finish, preventing snagging and maintaining a clean, professional appearance.
• 3/8" hex drive offers high torque capability for easy installation and removal with standard tools, boosting efficiency.
• Compliance with ASME B18.3, ASTM F835, RoHS 3, and REACH ensures adherence to industry standards for safety, quality, and environmental regulations.

Professional Applications & Engineering Value

This 5/8"-11 UNC flat head socket cap screw is engineered for heavy-duty industrial use, where reliability and precision are critical. Made from black-oxide alloy steel, it resists rust and wear in harsh conditions, such as machinery assembly, construction, and automotive applications. The fully threaded design with coarse UNC spacing ensures quick, secure fastening in materials like metal and hardwood, reducing installation time. The 82° countersink angle allows the head to sit flush, eliminating protrusions that could cause damage or safety hazards. With a Class 3A thread fit, it delivers tight tolerances for vibration-resistant connections, minimizing loosening in dynamic environments. Ideal for engineers and procurement specialists, this screw combines high tensile strength and standard compliance to solve common issues like joint failure and corrosion, enhancing operational efficiency.

Specification Summary & Compliance

This screw features precise Class 3A thread fit per UNC standards, ensuring accurate engagement and durability. Dimensions include a 5/8"-11 thread size, 1-1/4" length, and 3/8" hex drive for consistent performance. It meets ASME B18.3 and ASTM F835 specifications for socket cap screws, guaranteeing manufacturing quality. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for industrial use.