S-90997A310 M11 Flange Nuts

Flange Nuts

1243FA00011 Flange Nuts
1243FA00011 Flange Nuts

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

Part No.
Part No. 1243FA00011
Equivalent to mcmaster :
90997A310

Basic Information

System of Measurement Metric
Nut Type Flange

Dimension Parameters

Width 14 mm
Height 13 mm

Thread Parameters

Thread Type Metric
Thread Size M11
Thread Direction Right Hand
Thread Pitch 1.25 mm
Thread Spacing Fine
Thread Fit Class 5H

Head Parameters

Drive Style External 12-Point
Hex Nut Profile Standard

Flange Parameters

Flange Diameter 20.9
Flange Thickness 3.2 mm

Material & Strength Parameters

Material A286 Stainless Steel
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Enhanced corrosion resistance from premium A286 Stainless Steel, ideal for harsh industrial environments and high-temperature applications.
  • Superior load distribution and joint stability thanks to the integrated 20.9mm flange and 3.2mm thickness, preventing surface damage and loosening.
  • High-strength, precision threading with a Class 5H fit and M11 x 1.25mm fine pitch for reliable, vibration-resistant connections.
  • Efficient installation and high torque application enabled by the 12-point external drive, allowing for use in confined spaces.
  • Durable, long-lasting performance in demanding conditions due to the robust material and fine thread design that resists wear.
  • Wide compatibility with standard metric components, ensuring easy integration into existing assemblies.
  • Secure right-hand thread engagement for standard assembly processes, reducing installation errors.

Professional Applications & Engineering Value

This M11 flange nut is engineered to solve critical challenges in high-stress and corrosive environments. The A286 Stainless Steel construction offers exceptional strength and resistance to oxidation and high temperatures, making it perfect for aerospace, automotive, and heavy machinery applications where failure is not an option. The 12-point external drive facilitates quick, secure tightening even in tight spaces, while the integrated flange eliminates the need for a separate washer, distributing clamp load effectively to prevent joint fatigue and surface damage. With its fine thread pitch of 1.25mm, this nut ensures a tighter, more vibration-resistant fit, crucial for maintaining integrity in dynamic or high-vibration settings like engine components and structural assemblies.

Specification Summary & Compliance

This metric flange nut features precise M11 x 1.25mm fine threading with a Class 5H thread fit, ensuring high dimensional accuracy and compatibility. It adheres to standard metric threading specifications and is manufactured from A286 Stainless Steel, which meets industry requirements for high-performance applications. The product is designed to comply with relevant industrial standards for quality and safety, supporting reliable use in sectors requiring durable, corrosion-resistant industrial fasteners.

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