S-94239A104 1/4"-20 x 1 1/2" SAE J429 High-Strength Grade 8 Steel Serrated-Flange Hex Head Screws
High-Strength Grade 8 Steel Serrated-Flange Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with 150,000 PSI tensile strength for reliable performance in high-stress 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
- Optimal torque transmission via external hex drive and hex head design for secure installation and removal
- Reliable thread engagement with Class 2A UNC coarse threads ensuring consistent fastening performance
- Maximum thread coverage through full threading along the entire 1-1/2" length for superior holding power
- Industry-leading hardness at Rockwell C33 for excellent wear resistance and durability
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver exceptional engineering value in demanding industrial applications where failure is not an option. The combination of zinc-plated steel construction and 150,000 PSI tensile strength makes them ideal for heavy machinery, structural assemblies, and equipment subjected to extreme vibration and load conditions. The serrated locking flange provides superior anti-rotation properties, eliminating the need for additional locking components while the external hex drive ensures efficient installation with standard tools. The UNC coarse threads with Class 2A fit offer reliable performance in both soft and hard materials, making these fully threaded screws versatile solutions for construction, manufacturing, and automotive applications requiring high-strength fastening with environmental compliance.
Specification Summary & Compliance
These heavy-duty hex head screws feature precise Class 2A thread fit with UNC coarse threading (1/4"-20) and are manufactured to exacting standards including IFI 111 and SAE J429 Grade 8 specifications. The fasteners maintain full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring they meet current industry requirements for hazardous substance restrictions while delivering consistent dimensional accuracy and mechanical properties across all production batches.
