S-91271A728 1/2"-13 x 4" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Superior load-bearing capability with 170,000 psi tensile strength for reliable performance in demanding applications
• Enhanced corrosion resistance and durability through alloy steel construction with Rockwell C37 hardness
• Precise thread engagement with Class 3A fit UNC coarse threads ensuring secure, vibration-resistant connections
• Efficient installation and removal using the external 12-point drive system compatible with standard 1/2" tools
• Stable fastening performance from the integrated flange design that distributes load evenly
• Optimized thread utilization through partially threaded design that concentrates strength where needed most
• Regulatory compliance assurance meeting IFI 115 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

This 12-point screw delivers exceptional engineering value for heavy-duty industrial applications where reliability is critical. The alloy steel construction provides superior strength-to-weight ratio, making it ideal for structural assemblies, machinery frames, and equipment mounting that require high tensile strength (170,000 psi) and consistent performance under stress. The UNC coarse threading with Class 3A fit ensures rapid assembly while maintaining precise thread engagement, reducing installation time in production environments. The flanged design eliminates the need for separate washers, providing broader bearing surface that prevents surface damage and maintains joint integrity. The external 12-point drive offers multiple engagement angles for torque application in confined spaces, while the partially threaded configuration concentrates strength in the critical engagement zone, making these industrial screws perfect for applications requiring both clamping force and shear resistance.

Specification Summary & Compliance

This 1/2"-13 UNC screw features precise Class 3A thread fit with coarse thread spacing and right-hand threading. The fastener measures 4" in length with a minimum thread length of 1-1/2" and includes a 0.75" flange diameter. Manufacturing and performance specifications comply with IFI 115 standards, ensuring dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for global industrial applications with strict material restrictions.