S-90393A111 1/4"-20 x 1/2" 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
- Enhanced load distribution with integrated flange design that eliminates the need for separate washers
- Superior mechanical strength with Grade 5 classification supporting 120,000 psi tensile strength for heavy-duty applications
- Optimized thread engagement through UNC coarse threading and Class 2A fit ensuring reliable fastening in various materials
- Secure anti-rotation performance with serrated locking features beneath the hex head
- Industry-standard compatibility meeting SAE J429/IFI 111 specifications for consistent quality
- Environmental compliance with RoHS 3 and REACH regulations for safe industrial usage
- Efficient installation using standard 3/8" external hex drive tools for quick assembly
Professional Applications & Engineering Value
This Grade 5 hex head screw delivers exceptional engineering value through its fully threaded UNC coarse thread design, which provides superior pull-out resistance in soft materials and faster installation times. The flanged configuration distributes clamping force over a wider surface area (9/16" diameter), preventing surface damage and maintaining joint integrity under vibration. With Rockwell C22 hardness and 120,000 psi tensile strength, it withstands extreme mechanical stresses in construction equipment, automotive assemblies, and heavy machinery. The external hex drive and serrated locking features ensure secure fastening in high-vibration environments, while compliance with SAE J429 standards guarantees consistent performance across industrial applications.
Specification Summary & Compliance
Manufactured to IFI 111/SAE J429 specifications with Class 2A thread fit tolerance for precise engagement. The 1/4"-20 UNC coarse thread maintains dimensional accuracy across the 1/2" length with 9/32" head height and 3/8" head width. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage in global industrial markets.
