S-91271A572 1/4"-28 x 1" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with 170,000 psi tensile strength and Rockwell C37 hardness for reliable performance in demanding applications.
• Superior torque transmission and anti-slip fastening thanks to the external 12-point drive, ensuring secure installation and removal.
• Precision thread fit with Class 3A UNF fine threads for excellent vibration resistance and leak-proof sealing in critical assemblies.
• Integrated flange design eliminates the need for a separate washer, providing a larger bearing surface and simplifying installation.
• Full threading along the 1" length ensures maximum grip and uniform stress distribution across the entire fastened joint.
• High-grade alloy steel construction offers excellent fatigue resistance and long-term reliability in harsh industrial environments.
• Compliance with major industry and environmental standards including IFI 115, RoHS 3, and REACH, ensuring safety and regulatory acceptance.

Professional Applications & Engineering Value

This 12-point flanged screw is engineered to solve critical fastening challenges in high-stress applications such as heavy machinery, automotive systems, and precision equipment. The alloy steel material, combined with a Rockwell C37 hardness and 170,000 psi tensile strength, provides exceptional resistance to shear and fatigue, reducing the risk of fastener failure. The external 12-point drive allows for high torque application with minimal slippage, ideal for confined spaces where wrenches are used. The flanged design distributes clamping force evenly, preventing surface damage and loosening under vibration. With Class 3A UNF fine threads, it ensures tight, secure fits in components requiring fine adjustment and leak resistance, making it a top choice for precision fastening in aerospace, manufacturing, and hydraulic systems.

Specification Summary & Compliance

This screw features a 1/4"-28 UNF fine thread with a Class 3A fit for high precision and strength. Dimensions include a 1" length, 1/4" head height and width, and 3/8" flange diameter, with full threading and right-hand direction. It meets IFI 115 specifications for consistent quality and performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it adheres to strict environmental and safety regulations without hazardous substances.