S-92323A521 1/4"-20 x 1 1/4" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Enhanced Durability and Corrosion Resistance: Zinc-plated steel construction provides reliable protection against rust, extending service life in harsh industrial environments.
• High Tensile Strength for Demanding Applications: Grade 5 classification with 110,000 PSI tensile strength ensures secure fastening under heavy loads and vibrations.
• Secure Locking and Vibration Resistance: Serrated flange design prevents loosening, maintaining joint integrity in high-stress machinery and equipment.
• Easy Installation and Removal: External hex drive and coarse UNC threads allow for quick assembly with standard tools, reducing labor time and effort.
• Consistent Performance and Fit: Class 2A thread fit and fully threaded shank ensure precise engagement and uniform load distribution across applications.
• Superior Hardness for Wear Resistance: Rockwell C22 hardness minimizes wear and deformation, ideal for repetitive use in automotive and construction sectors.
• Broad Industrial Compliance: Meets SAE J429, RoHS 3, and REACH standards, guaranteeing safety and environmental responsibility in global supply chains.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel hex head screw is engineered to address critical challenges in industrial fastening, such as vibration-induced loosening and corrosion in demanding settings. The serrated locking flange provides enhanced grip on surfaces, preventing back-off in machinery, automotive assemblies, and structural frameworks. With a coarse UNC thread and fully threaded design, it ensures rapid installation and robust holding power, reducing downtime in production lines. The external hex drive facilitates easy torque application with common tools, while the zinc plating offers a cost-effective barrier against moisture and chemicals. Ideal for heavy-duty applications, this screw delivers reliable performance in construction, manufacturing, and equipment maintenance, where high tensile strength and compliance with industry standards are paramount for safety and efficiency.

Specification Summary & Compliance

This fastener adheres to precise dimensional tolerances, including Class 2A thread fit for consistent engagement and UNC coarse spacing for efficient assembly. It conforms to IFI 111 specifications SAE J429, ensuring mechanical properties meet rigorous industrial requirements. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, supporting environmental and health standards in global markets.