S-92323A535 5/16"-18 x 3/4" 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 high-stress applications and prevents fastener failure
• Corrosion-resistant zinc plating provides durable surface protection, extending service life in demanding industrial environments
• Serrated locking flange design creates vibration-resistant connections that maintain clamp load without requiring additional locking components
• Full UNC coarse threading enables faster installation and superior grip in a wide range of materials including metals and plastics
• Grade 5 classification guarantees consistent mechanical properties and reliable performance for critical assembly applications
• External hex drive configuration allows for high-torque installation with common tools while preventing cam-out during tightening
• Precision Class 2A thread fit ensures smooth assembly and consistent engagement with properly tapped holes

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel hex head screw delivers exceptional engineering value through its robust material composition and advanced flanged design with serrations. The zinc-plated steel construction provides superior corrosion resistance for industrial equipment, machinery assembly, and structural applications where environmental exposure is a concern. The fully threaded UNC coarse pattern combined with external hex drive enables rapid installation in high-volume production environments while maintaining secure fastening. The integrated serrated locking flange eliminates the need for separate washers or locking mechanisms, providing permanent vibration resistance in automotive, construction, and heavy equipment applications where dynamic loads and shock vibrations would compromise standard fasteners. This comprehensive engineering solution addresses common industrial pain points including corrosion-induced failure, vibration loosening, and installation inefficiency.

Specification Summary & Compliance

This fastener features precision 5/16"-18 UNC coarse threads with Class 2A thread fit tolerance for consistent engagement. Manufactured to meet IFI 111 specifications where identified as SAE J429 for Grade 5 mechanical properties. Compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations regarding chemical safety. The fastener delivers verified Rockwell C22 hardness and 110,000 psi tensile strength as specified for Grade 5 classification, ensuring reliable performance in demanding industrial applications.