S-91271A716 1/2"-13 x 1 1/2" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity: With a tensile strength of 170,000 psi and Rockwell C37 hardness, this screw withstands extreme mechanical stress, reducing the risk of fastener failure in demanding applications.
• Superior Thread Engagement & Reliability: Class 3A thread fit ensures precise, tight tolerances for secure fastening and vibration resistance, minimizing loosening in high-stress environments.
• Integrated Flange Design: The 0.75" flange diameter distributes load evenly, eliminating the need for separate washers and speeding up assembly while providing a larger bearing surface.
• High-Torque Installation Capability: The external 12-point drive and 1/2" drive size allow for efficient torque application with standard tools, enhancing installation speed and reducing assembly time.
• Optimized for Coarse Thread Applications: 1/2"-13 UNC coarse threads provide quick assembly and superior performance in materials prone to stripping or where rapid disassembly is required.
• Full Threading for Maximum Grip: Fully threaded design ensures consistent holding power along the entire 1-1/2" length, providing uniform clamping force in thick or layered materials.
• Corrosion & Compliance Ready: Manufactured from high-strength alloy steel and compliant with RoHS 3, REACH, and IFI 115 standards, ensuring environmental safety and regulatory acceptance in global markets.

Professional Applications & Engineering Value

This 12-point flanged screw is engineered to address critical challenges in heavy machinery, structural steel connections, and high-vibration industrial equipment. The alloy steel construction, combined with a Rockwell C37 hardness rating, provides exceptional resistance to wear and deformation under cyclic loading. The UNC coarse thread with Class 3A fit ensures rapid, reliable installation in coarse-grained materials or where alignment tolerance is limited, reducing the risk of cross-threading. The integrated flange eliminates washer requirements, streamlining inventory and assembly processes in automotive, construction, and manufacturing sectors. Its fully threaded design and 170,000 psi tensile strength make it ideal for applications requiring uniform clamping force and high fatigue resistance, such as engine components, hydraulic systems, and structural frameworks.

Specification Summary & Compliance

This screw adheres to precise dimensional standards with a Class 3A thread fit for superior accuracy and a 1/2"-13 UNC coarse thread profile. Manufacturing and material specifications meet IFI 115 requirements, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances and supporting sustainable procurement practices in industrial supply chains.