S-91251A889 12-24 x 2" 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.
• 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.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use and adjustments.
• Standard hex drive (5/32") allows for easy installation and removal with common tools, speeding up assembly and disassembly processes.
• Coarse UNC threads enable quick engagement and are less prone to clogging in dirty or debris-filled applications, improving efficiency.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency, environmental safety, and suitability for regulated industries.

Professional Applications & Engineering Value

These 12-24 UNC thread Socket Head Cap Screws are engineered to address critical challenges in industrial assembly, such as vibration-induced loosening and corrosion in demanding environments. Made from black-oxide alloy steel, they provide a robust solution for machinery, automotive, and heavy equipment applications where high tensile strength and durability are paramount. The coarse thread design and Class 3A fit ensure rapid, secure fastening even in high-vibration settings, reducing downtime and maintenance costs. Their partially threaded configuration allows for precise clamping force distribution, making them ideal for components requiring adjustable tension without compromising structural integrity. By integrating these screws, engineers can achieve reliable, long-lasting connections that withstand extreme operational stresses.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse threads with a size of 12-24. It meets ASTM A574 specifications for high-strength socket head cap screws, ensuring consistent quality and performance. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms environmental and safety standards, making it suitable for global industrial use without hazardous substances.