S-91251A290 12-24 x 1/4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 PSI ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the black-oxide finish protects against rust and environmental degradation, extending service life in harsh industrial settings.
• Precise Class 3A thread fit guarantees tight, secure fastening with minimal play, enhancing assembly accuracy and vibration resistance.
• High hardness rating (Rockwell C37) provides excellent wear resistance, maintaining thread integrity and drive engagement through repeated use.
• Coarse UNC threads enable quicker installation and are less prone to clogging with debris, improving efficiency in maintenance and production lines.
• Fully threaded design offers consistent clamping force along the entire length, ideal for applications requiring uniform pressure distribution.
• Standard hex drive compatibility with common 5/32" tools simplifies installation and removal, reducing labor time and tooling costs.

Professional Applications & Engineering Value

Engineered for rigorous industrial use, these Black-Oxide Alloy Steel Socket Head Cap Screws address common challenges in machinery, automotive, and heavy equipment assembly. The 12-24 UNC coarse threads and Class 3A fit provide superior resistance to loosening under vibration, a critical factor in dynamic environments. The alloy steel construction combined with the protective black-oxide coating ensures longevity in corrosive conditions, minimizing maintenance downtime. With a fully threaded rod and high tensile strength, they deliver consistent clamping force in high-load applications, making them ideal for securing critical components where reliability is paramount. Their compliance with ASTM A574 standards assures consistent quality and performance across batches.

Specification Summary & Compliance

This socket head cap screw features precise 12-24 UNC coarse threads with a Class 3A thread fit for tight tolerances, and is manufactured to ASTM A574 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for global industrial use.