S-91271A678 7/16"-14 x 2 1/4" IFI 115 12-Point Screws

12-Point Screws

0806FA00052 12-Point Screws
0806FA00052 12-Point Screws

Image may differ from product. See technical specification for details.

Part No.
Part No. 0806FA00052
Equivalent to mcmaster :
91271A678

Basic Information

Screw Features Flanged
System of Measurement Inch

Head Parameters

Head Type 12-Point
Head Width 7/16"
Head Height 7/16"

Dimensions

Length 2 1/4"
Flange Diameter 21/32"

Thread Parameters

Thread Type UNC
Thread Size 7/16"-14
Thread Diameter 0.4375"
Thread Spacing Coarse
Min Thread Length 1 3/8"
Thread Direction Right Hand
Thread Fit Class 3A
Threading Partially Threaded

Tip & Drive Parameters

Drive Style External 12-Point
Drive Size 7/16"

Material & Strength

Material Alloy Steel
Hardness Rockwell C37
Tensile Strength 170000 psi

Temperature & Environment

REACH Compliant
RoHS Compliant
Specifications Met IFI 115
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Superior strength and durability with alloy steel construction, providing a high tensile strength of 170,000 psi for reliable performance in demanding applications.
  • Precise thread engagement with Class 3A thread fit, ensuring tight, secure connections and reducing the risk of loosening under vibration.
  • Enhanced torque application through the external 12-point drive and head design, allowing for high-torque installation with standard tools.
  • Flanged design eliminates the need for separate washers, simplifying assembly and providing a larger bearing surface for improved load distribution.
  • Partial threading offers optimal grip length for specific joint requirements, enhancing clamping force and stability.
  • Compliance with industry standards including IFI 115, RoHS 3, and REACH, ensuring safety, environmental responsibility, and interoperability.
  • Coarse UNC threads enable quick assembly and disassembly, reducing installation time in industrial settings.

Professional Applications & Engineering Value

This 12-point flange screw is engineered to address critical challenges in heavy-duty industrial assemblies, such as machinery, automotive, and construction equipment. The alloy steel material, combined with a Rockwell C37 hardness and 170,000 psi tensile strength, ensures resistance to high stress and fatigue, preventing failures in dynamic environments. The external 12-point drive allows for efficient torque transfer, minimizing slippage during installation, while the flanged feature distributes load evenly, reducing surface damage. With a Class 3A thread fit and coarse UNC threading, it provides reliable, vibration-resistant connections, making it ideal for applications where precision and durability are paramount. This screw meets IFI 115 specifications and environmental regulations, offering a dependable solution for engineers seeking high-performance fasteners.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse threads (7/16"-14) for efficient assembly. It meets IFI 115 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it is free from hazardous substances and suitable for global industrial use.

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