S-91271A759 1/2"-20 x 1 1/4" IFI 115 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with 170,000 psi tensile strength for reliable performance in high-stress applications
• Superior thread precision with Class 3A fit ensuring tight, secure connections and reduced risk of loosening
• Enhanced durability from alloy steel construction and Rockwell C37 hardness for long service life in demanding environments
• Efficient installation and removal with external 12-point drive and flange design providing increased wrenching surface and vibration resistance
• Optimized for fine-thread applications using 1/2"-20 UNF threading for improved adjustment accuracy and superior clamping force
• Full threading coverage along the 1 1/4" length enables consistent engagement across the entire fastener
• Compliance with industry standards including IFI 115, RoHS 3, and REACH for quality assurance and environmental responsibility

Professional Applications & Engineering Value

This 12-point flange screw delivers critical engineering solutions where vibration resistance, high tensile strength, and precise thread engagement are paramount. Manufactured from alloy steel with Rockwell C37 hardness, it withstands extreme mechanical stresses in heavy machinery, automotive assemblies, and structural frameworks. The UNF fine threading with Class 3A fit ensures minimal backlash and superior clamp load distribution, effectively preventing joint failure in dynamic load conditions. The integrated flange eliminates the need for separate washers, streamlining assembly while providing a larger bearing surface. Fully threaded design guarantees uniform stress distribution along the entire 1 1/4" length, making it ideal for applications requiring consistent torque transmission and reliable fastening integrity.

Specification Summary & Compliance

This screw features precision 1/2"-20 UNF fine threading with Class 3A thread fit for exacting dimensional accuracy. It meets IFI 115 specifications for 12-point fasteners and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The product maintains consistent thread diameter of 0.5" and flange diameter of 0.75" with right-hand thread direction, manufactured to industrial standards for reliable performance in professional applications.