S-91271A634 3/8"-16 x 2 1/2" IFI 115 12-Point Screws
12-Point Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional load-bearing capacity with 170,000 psi tensile strength for reliable performance in high-stress applications
- Superior thread engagement with Class 3A fit ensuring precise assembly and vibration resistance
- Enhanced torque transmission through external 12-point drive design for secure installation
- Integrated flange design eliminates need for separate washers while providing superior load distribution
- Optimized partial threading allows for controlled clamping force and reduced thread damage risk
- Premium alloy steel construction with Rockwell C37 hardness delivers excellent durability and wear resistance
- Coarse UNC threading enables faster installation and better performance in challenging materials
Professional Applications & Engineering Value
This 12-point flange screw addresses critical engineering challenges in heavy machinery, automotive assemblies, and structural applications where vibration resistance and high tensile strength are paramount. The alloy steel construction combined with Class 3A thread fit ensures reliable performance in dynamic load conditions, while the integrated flange design provides superior bearing surface without requiring additional components. The external 12-point drive allows for high-torque installation in confined spaces, making it ideal for industrial fastening applications where access is limited. The partially threaded configuration concentrates clamping force precisely where needed, preventing joint loosening in heavy-duty equipment and mechanical systems subject to constant stress and vibration.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread tolerances with 3/8"-16 UNC coarse threading and right-hand thread direction. Complies with IFI 115 specifications for dimensional accuracy and performance standards. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features include 2 1/2" overall length, 9/16" flange diameter, and partial threading with minimum 1 1/4" thread length.
