S-94386A101 1/4"-20 x 1" IFI 111, SAE J429 Extra-Wide Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Enhanced Corrosion Resistance: Zinc-plated steel construction provides reliable protection against rust, extending service life in demanding environments.
• Superior Clamping Force & Vibration Resistance: Serrated flange design eliminates the need for a separate washer and provides excellent anti-loosening performance under vibration.
• High-Strength for Demanding Applications: Grade 5 classification and 110,000 psi tensile strength ensure reliable performance in high-stress assemblies.
• Effortless Installation & High Torque Capability: External hex drive and coarse UNC thread allow for quick assembly and high torque application with standard tools.
• Consistent & Reliable Thread Engagement: Class 2A thread fit ensures easy starts and predictable, secure fastening across production runs.
• Optimal Material Durability: Rockwell C22 hardness provides a robust balance of strength and ductility to resist wear and deformation.
• Full Thread Engagement: Fully threaded design maximizes grip length and provides uniform clamping force along the entire fastener.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel hex head screw is engineered to solve critical challenges in industrial assembly and heavy-duty equipment manufacturing. The serrated locking flange directly addresses the common failure point of vibration-induced loosening, providing a secure, one-piece fastener solution that maintains joint integrity. Its UNC coarse thread and external hex drive facilitate rapid installation in a variety of materials, reducing assembly time while the high tensile strength ensures long-term reliability in structural applications. This combination of features makes it an ideal choice for automotive frames, machinery, and construction equipment where durability and vibration resistance are paramount.

Specification Summary & Compliance

This fastener features a 1/4"-20 UNC thread with a Class 2A fit for consistent dimensional accuracy. It is manufactured to meet the mechanical properties and material requirements of IFI 111 / SAE J429 for Grade 5. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it meets global standards for restricted substances.