S-92323A121 5/16"-18 x 2 3/4" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Serrated-Flange Hex Head Screws
Medium-Strength Grade 5 Steel Serrated-Flange Hex Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Enhanced corrosion resistance with zinc-plated steel coating, extending service life in harsh industrial environments
- Superior load-bearing capability with Grade 5 classification and 110,000 psi tensile strength for heavy-duty applications
- Reliable vibration resistance through serrated locking flange design, preventing loosening under dynamic loads
- Optimized installation efficiency with external hex drive and coarse UNC threads for faster assembly
- Precise thread engagement with Class 2A fit ensuring consistent clamping force and reduced cross-threading risks
- Full-threaded design providing maximum grip length and uniform stress distribution
- Rockwell C22 hardness maintaining structural integrity under repeated torque applications
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these Grade 5 hex head screws address critical fastening challenges in construction, machinery assembly, and heavy equipment manufacturing. The zinc-plated steel construction provides essential corrosion protection for outdoor or high-moisture environments, while the serrated flange design eliminates the need for separate washers and creates positive locking action against vibration-induced failure. The coarse UNC thread profile ensures rapid installation in structural steel, aluminum framing, and cast components, with the external hex drive accommodating standard wrenching tools for high-torque applications. These fully threaded fasteners deliver uniform clamping force across the entire engagement length, making them ideal for thick-section assemblies requiring maximum load distribution.
Specification Summary & Compliance
Manufactured to IFI 111/SAE J429 specifications with Class 2A thread fit ensuring dimensional accuracy and interchangeability. The 5/16"-18 UNC coarse thread maintains standard pitch compatibility, while the 2 3/4" length provides precise sizing for engineering applications. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting international standards for hazardous substance restrictions.
