S-92323A536 5/16"-18 x 7/8" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 110,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
• Zinc-plated steel construction provides excellent corrosion resistance, extending service life in various industrial environments.
• Grade 5 classification and Rockwell C22 hardness offer superior durability and consistent mechanical properties for repeated use.
• UNC coarse threading with Class 2A fit allows for faster assembly and easier alignment, improving installation efficiency.
• Flanged hex head design eliminates the need for a separate washer, providing a larger bearing surface and more secure fastening.
• Full threading along the 7/8" length ensures maximum grip and uniform stress distribution across the entire fastener.
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and regulatory adherence for global supply chains.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel hex head screw is engineered to address critical challenges in heavy machinery, automotive assemblies, and structural frameworks. Its UNC coarse thread design resists vibration loosening and enables quick installation in high-volume production lines, reducing labor time. The external hex drive and serrated locking flange provide secure torque transmission and prevent rotation under dynamic loads. With a tensile strength of 110,000 psi and Rockwell C22 hardness, it maintains integrity in high-stress environments, offering a reliable alternative to standard fasteners where failure is not an option. Ideal for construction equipment, truck chassis, and industrial fixtures, this screw combines SAE J429 compliance with robust material properties to ensure long-term performance and safety.

Specification Summary & Compliance

This fastener adheres to IFI 111 / SAE J429 standards for dimensional accuracy and mechanical properties. Thread specifications include 5/16"-18 UNC coarse threading with a Class 2A thread fit for consistent engagement. The zinc-plated steel construction meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. Additional features include a flanged head with an 11/16" diameter and full threading across the 7/8" length, providing reliable fastening in accordance with industrial manufacturing requirements.