S-92323A529 1/4"-20 x 3" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with Grade 5 classification and 110,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through zinc-plated steel construction, extending service life in harsh industrial environments
• Secure anti-loosening performance with serrated locking flange that maintains tight connections under vibration and dynamic loads
• Optimized installation efficiency featuring external hex drive and UNC coarse threading for quick assembly and disassembly
• Full-thread engagement capability providing maximum grip strength and distribution along the entire 3" length
• Precision thread fit with Class 2A tolerance ensuring consistent performance and compatibility with standard nuts
• Enhanced bearing surface from the 9/16" flange diameter, reducing surface pressure and preventing material damage

Professional Applications & Engineering Value

Engineered for industrial-grade fastening solutions, these Grade 5 hex head screws deliver exceptional performance in machinery assembly, structural frameworks, and heavy equipment applications. The zinc-plated steel construction provides critical corrosion protection in manufacturing facilities and outdoor installations, while the serrated locking flange effectively counters vibration-induced loosening – a common failure point in dynamic systems. The UNC coarse threading ensures rapid installation and superior resistance to cross-threading, particularly beneficial in high-volume production environments. With fully threaded design and external hex drive, these screws offer maximum clamping force distribution and tool accessibility in confined spaces, making them ideal for automotive, construction, and industrial maintenance applications where reliability and speed of installation are paramount.

Specification Summary & Compliance

This 1/4"-20 x 3" hex head screw features precise Class 2A thread fit per UNC standards with coarse thread spacing for optimal engagement. Manufactured to meet IFI 111 specifications where identified as SAE J429, ensuring consistent quality and performance. The fastener demonstrates full compliance with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations (updated 06/14/2023 for 235 SVHC), confirming adherence to international safety and environmental standards for industrial components.