S-94239A412 1/2"-13 x 1 1/2" IFI 111 High-Strength Grade 8 Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Maximum load-bearing capacity with Grade 8 rating and 150,000 psi tensile strength for critical structural applications
• Superior corrosion resistance through zinc-plated steel construction, extending service life in harsh environments
• Enhanced vibration resistance with serrated locking flange design that prevents loosening under dynamic loads
• Precise thread engagement with Class 3A UNC coarse threads ensuring reliable installation and consistent clamping force
• High-torque installation capability through external hex drive and full-height hex head design for secure tool engagement
• Reduced assembly complexity with integrated flange eliminating the need for separate washers in many applications
• Industry-standard compatibility meeting IFI 111 and SAE J429 specifications for guaranteed interchangeability

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these Grade 8 hex head screws deliver exceptional performance in heavy machinery, structural steel connections, and high-vibration environments. The zinc-plated steel construction provides reliable corrosion protection while maintaining the 150,000 psi tensile strength required for critical load-bearing applications. The serrated locking flange actively resists rotational loosening caused by vibration, eliminating the need for additional locking components. With Class 3A UNC coarse threads, these fasteners ensure rapid installation and superior thread engagement in both thick materials and assembly line production. The external hex drive design accommodates high torque values, making them ideal for applications requiring substantial clamping force without stripping the drive mechanism.

Specification Summary & Compliance

Manufactured to precise Class 3A thread fit standards with UNC coarse thread profile (1/2"-13) and right-hand threading. Full compliance with IFI 111 and SAE J429 Grade 8 specifications ensures mechanical properties and dimensional accuracy. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards for restricted substances. Features Rockwell C33 hardness and fully threaded design for consistent performance across the entire fastener length.