S-91253A285 12-24 x 1 1/2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional holding power with 130,000 psi tensile strength and full threading for maximum load distribution and resistance to pull-out.
• Superior corrosion resistance from the Black-Oxide finish on Alloy Steel, extending service life in demanding industrial environments.
• Precise and reliable thread engagement ensured by the Class 3A thread fit, minimizing the risk of cross-threading and ensuring consistent clamp load.
• Efficient installation and high torque capability with the 1/8" Hex Drive, allowing for secure driving without cam-out.
• Flush, low-profile seating with the standard 82° countersink angle, ideal for applications where a smooth surface finish is critical.
• Enhanced durability and wear resistance provided by the Rockwell C39 hardness, maintaining thread integrity through repeated use.
• Guaranteed material and manufacturing quality through compliance with ASTM F835, ensuring consistent performance and reliability.

Professional Applications & Engineering Value

This 12-24 UNC Flat Head Screw is engineered to solve critical fastening challenges in industrial machinery, automotive assemblies, and heavy-duty equipment. The Black-Oxide Alloy Steel construction provides a robust barrier against rust and corrosion, essential for operations in humid or chemically aggressive settings. The coarse thread spacing and Class 3A thread fit enable rapid assembly with high vibration resistance, reducing maintenance downtime. The fully threaded design and hex drive ensure maximum grip and easy installation in confined spaces, making these high tensile strength screws a reliable choice for engineers prioritizing long-term structural integrity and compliance with stringent industry standards.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 3A thread fit for superior accuracy and a standard 82° countersink angle. It is manufactured in compliance with the ASTM F835 specification, guaranteeing material and mechanical properties. The product is also confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it is free of hazardous substances and safe for use in regulated markets.