S-90409A154 1/2"-13 x 2 3/4" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws
High-Strength Grade 8 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
- Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance and durability thanks to Grade 8 steel construction with Rockwell C32 hardness
- Secure fastening with reduced loosening risk through UNC coarse threads and Class 2A thread fit for consistent engagement
- Enhanced stability and load distribution from the integrated flange design, eliminating the need for separate washers
- Easy installation and removal with external hex drive and 3/4" head width for standard tool compatibility
- Optimized for demanding environments with partial threading providing unthreaded shank strength where needed
- Compliance with industry standards including SAE J429, RoHS 3, and REACH for quality assurance and environmental safety
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering value in heavy machinery, construction equipment, and industrial assemblies where high tensile strength and vibration resistance are paramount. The 1/2"-13 UNC coarse thread configuration ensures rapid installation and reliable holding power in structural steel connections, while the partially threaded design provides maximum shear strength in the unthreaded portion. The flanged head distributes clamping force evenly, preventing surface damage and maintaining joint integrity under dynamic loads. Manufactured from Grade 8 steel with Rockwell C32 hardness, this external hex drive screw withstands extreme conditions in automotive, agricultural, and manufacturing applications where failure is not an option.
Specification Summary & Compliance
This fastener features Class 2A thread fit per UNC standards with precise dimensional accuracy. Manufacturing complies with IFI 111 specifications meeting SAE J429 requirements for Grade 8 fasteners. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental responsibility and regulatory adherence for global industrial applications.
