S-92323A103 1/4"-28 x 1" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-term durability in harsh industrial environments
• High-strength performance with Grade 5 rating, providing 110,000 psi tensile strength for reliable load-bearing applications
• Secure anti-loosening lock through serrated flange design that prevents vibration-induced loosening without separate washers
• Precision fine threading with UNF 1/4"-28 and Class 2A fit for superior engagement and vibration resistance in critical assemblies
• Easy installation and removal with standard 3/8" external hex head design compatible with common wrench tools
• Full thread coverage along the 1" length for maximum grip strength and uniform stress distribution
• Regulatory compliance assurance meeting SAE J429, RoHS 3, and REACH standards for global industrial applications

Professional Applications & Engineering Value

Engineered for demanding industrial fastening applications, these Grade 5 zinc-plated steel hex head screws deliver exceptional value in machinery assembly, automotive components, and structural frameworks. The UNF fine threading (1/4"-28) provides superior vibration resistance compared to coarse threads, while the serrated flange eliminates the need for additional locking components, reducing assembly time and part count. The zinc plating creates a sacrificial barrier against corrosion, extending service life in environments exposed to moisture and chemicals. With Rockwell C22 hardness and 110,000 psi tensile strength, these fully threaded screws maintain integrity under dynamic loads and thermal cycling, making them ideal for high-stress applications where fastener failure is not an option.

Specification Summary & Compliance

This hex head screw features precision Class 2A thread fit with UNF fine threading (1/4"-28) and meets IFI 111 specifications where identified as SAE J429. The fastener demonstrates full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations regarding chemical safety. Manufacturing adheres to standardized dimensions including 3/8" hex head width, 9/32" head height, and 9/16" flange diameter, ensuring interchangeability and reliable performance across industrial applications.