S-90129A119 5/16"-18 x 1 1/2" IFI 111, SAE J429 Medium-Strength Grade 5 Steel Flanged Hex Head Screws
Medium-Strength Grade 5 Steel Flanged 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 corrosion resistance with black protective coating for extended service life in harsh industrial environments
- Superior load-bearing capacity with 120,000 psi tensile strength for heavy-duty applications
- Reliable mechanical performance backed by Grade 5 classification and Rockwell C22 hardness rating
- Simplified installation with external hex drive design providing secure tool engagement
- Optimized thread engagement through UNC coarse threading with Class 2A fit for consistent fastening
- Integrated flange design eliminates need for separate washers while distributing clamp load effectively
- Partial threading configuration allows for precise clamping control in various material thicknesses
Professional Applications & Engineering Value
This Grade 5 hex head screw delivers exceptional engineering value through its black corrosion-resistant coated steel construction, specifically designed to combat environmental degradation in industrial settings. The 5/16-18 UNC coarse thread pattern with Class 2A fit ensures reliable engagement in various materials while resisting vibration-induced loosening. The partially threaded design provides optimal clamping force concentration, making it ideal for structural assemblies, machinery frames, and equipment manufacturing where precise joint integrity is critical. The integrated flanged head design streamlines installation by eliminating separate washers, reducing assembly time and component count in production environments. These industrial fasteners maintain consistent performance under substantial mechanical stress, supported by their 120,000 psi tensile strength rating for demanding applications.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit tolerance and UNC coarse thread specification. Complies with SAE J429 mechanical requirements for Grade 5 fasteners and meets IFI 111 specifications. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring restricted substance adherence for global industrial applications.
