S-91271A633 3/8"-16 x 2 1/4" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional durability and strength with alloy steel construction and 170,000 psi tensile strength, ensuring reliable performance in demanding applications.
• Superior thread engagement and vibration resistance thanks to Class 3A thread fit and UNC coarse threading, providing a secure, long-lasting hold.
• Efficient installation and high torque capability with the external 12-point drive and 3/8" drive size, allowing for quick assembly with standard tools.
• Enhanced load distribution and stability from the integrated flange, reducing the need for a separate washer and preventing surface damage.
• Optimized for high-stress environments with Rockwell C37 hardness, offering excellent resistance to wear and deformation.
• Versatile fastening solution with partial threading, ideal for applications requiring precise clamp load and unthreaded shank strength.
• Compliance with industry standards including IFI 115, RoHS 3, and REACH, ensuring safety, quality, and environmental responsibility.

Professional Applications & Engineering Value

This 12-point flanged screw is engineered to address critical challenges in heavy machinery, automotive, and construction sectors, where high tensile strength and vibration resistance are paramount. The alloy steel material, combined with a Rockwell C37 hardness, ensures it withstands extreme loads and repetitive stress without failure. The UNC coarse thread and Class 3A thread fit provide superior grip in coarse-grained materials, reducing the risk of loosening under dynamic conditions. The external 12-point drive allows for efficient torque application, speeding up assembly in tight spaces, while the flanged design distributes pressure evenly, minimizing surface damage and simplifying installation. Ideal for bolted joints in structural frames, engine components, and industrial equipment, this screw enhances assembly reliability and reduces maintenance needs, delivering long-term engineering value.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse threading with a 3/8"-16 thread size. It meets IFI 115 specifications for quality and performance, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use. The partial threading and right-hand thread direction further support its role in high-strength, inch-based fastening systems.