S-90129A124 3/8"-16 x 1 1/2" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black protective coating extending service life in harsh environments
• Exceptional 120,000 psi tensile strength for reliable performance in heavy-duty applications
• Flanged design eliminates need for separate washers while providing superior load distribution
• Fully threaded UNC coarse thread pattern ensures faster installation and stronger holding power
• Class 2A thread fit guarantees consistent engagement and reliable assembly performance
• External hex drive design enables high-torque installation with standard tools
• Rockwell C22 hardness rating provides excellent durability and resistance to wear

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these Grade 5 hex head screws combine black corrosion-resistant coated steel construction with UNC coarse threading to solve critical fastening challenges. The flanged design prevents loosening under vibration while distributing clamp load effectively, making them ideal for structural assemblies, heavy machinery, and equipment manufacturing. With fully threaded configuration and Class 2A thread fit, these screws deliver consistent performance in automotive, construction, and industrial maintenance applications where reliability and corrosion protection are paramount.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with Class 2A thread fit tolerance and UNC coarse thread specifications. Complies with SAE J429 standards for Grade 5 mechanical properties, RoHS 3 (2015/863/EU) for hazardous substance restrictions, and REACH (EC 1907/2006) regulations for chemical safety. Meets IFI 111 specifications where applicable to SAE J429 requirements.