S-90393A112 1/4"-20 x 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
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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 120,000 PSI tensile strength for reliable performance in demanding applications
- Superior wear resistance due to Rockwell C22 hardness, ensuring long service life under repeated stress
- Secure anti-loosening performance through serrated locking features that maintain joint integrity under vibration
- Easy installation and removal with external hex drive design compatible with standard tools
- Enhanced load distribution from the integrated flange that reduces surface pressure and prevents pull-through
- Reliable thread engagement with Class 2A thread fit ensuring consistent assembly quality
- Environmental compliance assurance meeting RoHS 3 and REACH standards for safe industrial use
Professional Applications & Engineering Value
These Grade 5 hex head screws deliver critical engineering solutions where vibration resistance and structural integrity are paramount. The combination of UNC coarse threading and fully threaded design provides superior pull-out resistance in metal assemblies, while the serrated locking feature beneath the flange creates permanent anti-rotation security without requiring additional locking components. Manufactured to IFI 111/SAE J429 specifications, these industrial screws maintain precise dimensional stability across temperature variations, making them ideal for heavy machinery, automotive subsystems, and structural steel connections where 120,000 PSI tensile strength ensures joint reliability under dynamic loading conditions.
Specification Summary & Compliance
This 1/4"-20 hex head screw features Class 2A thread fit per UNC standards with 3/4" length and 9/16" flange diameter. Manufacturing complies with IFI 111 SAE J429 for dimensional and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring restricted substance adherence for global industrial applications.
