S-97972A513 1/2"-13 x 1 1/4" Extreme-Strength Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity – With 180,000 psi tensile strength and Rockwell C38 hardness, this screw withstands extreme mechanical stresses without failure.
• Corrosion-Resistant Black-Oxide Finish – The steel surface treatment provides durable protection against rust, extending service life in harsh industrial environments.
• Integrated Flange Design – Eliminates the need for separate washers, distributing clamp load evenly and speeding up assembly processes.
• Coarse UNC Threads – Ensures quick installation and reliable grip in a wide range of materials, reducing cross-threading risks.
• Class 2A Thread Fit – Delivers consistent, precision threading for smooth engagement and secure fastening in high-vibration applications.
• External Hex Drive – Allows for high-torque application with standard tools, ensuring tight, secure connections in heavy-duty assemblies.
• Fully Threaded Shank – Maximizes holding power along the entire length, providing uniform stress distribution and superior pull-out resistance.

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this black-oxide steel hex head screw combines high tensile strength (180,000 psi) with a corrosion-resistant finish to address common challenges in machinery, structural steel, and heavy equipment assembly. The coarse UNC threading and Class 2A thread fit ensure rapid, reliable installation in both metal and composite materials, minimizing assembly time while preventing loosening under dynamic loads. The integrated flange acts as a built-in washer, eliminating component count and enhancing joint integrity in high-stress environments. Ideal for construction, automotive, and manufacturing sectors, this fully threaded external hex drive screw delivers consistent performance where vibration resistance and durability are critical.

Specification Summary & Compliance

This 1/2"-13 UNC hex head screw adheres to standard inch measurements with a Class 2A thread fit for precise, interchangeable assembly. Manufactured from high-strength steel with a black-oxide surface treatment, it meets industry requirements for corrosion protection and mechanical performance. The product conforms to applicable ASME/ANSI standards for dimensional accuracy and is produced in compliance with RoHS and REACH environmental directives, ensuring safe use in global industrial markets.