S-90409A156 1/2"-13 x 3 1/2" IFI 111, SAE J429 High-Strength Grade 8 Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior wear resistance due to Rockwell C32 hardness, ensuring extended service life in demanding environments
• Secure fastening with coarse UNC threading that provides excellent grip and reduces cross-threading risks in various materials
• Enhanced stability with flanged design that distributes clamping pressure evenly and eliminates the need for separate washers
• Optimized torque transmission through external hex drive design for efficient installation with standard tools
• Precision thread fit (Class 2A) ensuring consistent engagement and reliable performance in assembly operations
• Industry compliance assurance meeting IFI 111/SAE J429 standards for quality and reliability in industrial applications

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers exceptional engineering value through its high-strength steel construction and specialized design features. The 1/2"-13 UNC coarse thread configuration provides superior holding power in structural applications, while the partial threading allows for precise clamp load control in critical assemblies. The flanged design eliminates washer requirements and provides superior surface distribution, preventing material damage in soft substrates. With 150,000 psi tensile strength and Rockwell C32 hardness, this fastener withstands extreme vibration, dynamic loads, and harsh environmental conditions common in construction, heavy machinery, and industrial equipment applications. The external hex drive ensures compatibility with standard tools, facilitating efficient installation in confined spaces.

Specification Summary & Compliance

This heavy-duty fastener features precision Class 2A thread fit with 1/2"-13 UNC coarse threading and 3 1/2" length with minimum thread length of 1 1/4". Manufactured to IFI 111 specifications SAE J429, ensuring consistent quality and performance. The screw is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant (06/14/2023 235 SVHC), meeting international environmental and safety standards for industrial use.