S-91271A721 1/2"-13 x 2 1/4" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity – With a 170,000 psi tensile strength and Rockwell C37 hardness, this screw withstands extreme mechanical stress, reducing the risk of failure in demanding applications.
• Precise Thread Engagement – Class 3A thread fit ensures tighter tolerances and superior vibration resistance, providing reliable, long-lasting fastening in critical assemblies.
• Enhanced Torque Application – The external 12-point drive and 1/2" drive size allow for high-torque installation with standard tools, speeding up assembly while minimizing slippage.
• Integrated Flange Design – The built-in flange (0.75" diameter) distributes clamping force evenly, eliminating the need for separate washers and simplifying inventory.
• Optimized for Coarse Thread Applications – 1/2"-13 UNC coarse threading resists loosening under vibration and allows for quicker installation in softer materials or where rapid assembly is key.
• Durable Alloy Steel Construction – Manufactured from high-strength alloy steel, this screw offers excellent corrosion resistance and fatigue life, ideal for harsh industrial environments.
• Regulatory Compliance & Traceability – Meets IFI 115 specifications and is RoHS 3 and REACH compliant, ensuring safety and environmental standards are upheld in global supply chains.

Professional Applications & Engineering Value

This 12-point flange screw is engineered to address common challenges in heavy machinery, structural steel connections, and high-vibration equipment. The alloy steel material, combined with a Rockwell C37 hardness and 170,000 psi tensile strength, ensures it can handle dynamic loads without stripping or shearing. The external 12-point drive facilitates secure tool engagement, allowing mechanics to apply higher torque efficiently—critical in confined spaces or when using pneumatic tools. The partially threaded design and UNC coarse thread enhance grip in softer substrates or where rapid disassembly is necessary, reducing installation time and maintenance costs. Its flanged head eliminates washer requirements, streamlining assembly processes in automotive, construction, and industrial manufacturing sectors where reliability and speed are paramount.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 3A thread fit for superior accuracy and a 1/2"-13 UNC coarse thread with a minimum thread length of 1 1/2". It is manufactured in accordance with IFI 115 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets rigorous environmental and safety requirements for industrial use.