S-91005A038 M12 Flange Nuts

Flange Nuts

1237FA00004 Flange Nuts
1237FA00004 Flange Nuts

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

Part No.
Part No. 1237FA00004
Equivalent to mcmaster :
91005A038

Basic Information

System of Measurement Metric
Nut Type Flange, Hex

Dimension Parameters

Width 19 mm
Height 17 mm

Thread Parameters

Thread Type Metric
Thread Size M12
Thread Direction Right Hand
Thread Pitch 1.75 mm
Thread Spacing Coarse
Thread Fit Class 6G

Head Parameters

Drive Style External Hex
Hex Nut Profile Standard

Flange Parameters

Flange Diameter 27 mm
Flange Thickness 4 mm

Material & Strength Parameters

Material Black-Oxide Steel

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) compliant with exemption 6(a) - Lead as an alloying element in steel
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Enhanced load distribution with a 27mm flange diameter that prevents surface damage and reduces the risk of loosening under vibration
  • Superior corrosion resistance thanks to the black-oxide steel finish, extending service life in harsh industrial environments
  • Quick and easy installation with coarse 1.75mm pitch threads and Class 6G fit, ensuring reliable engagement and reduced assembly time
  • Secure torque application via the standard external hex drive and 19mm width, compatible with common wrenches for firm fastening
  • Durable construction from robust steel material, capable of withstanding high stress and repetitive loads without failure
  • Compliance with environmental standards as RoHS 3 compliant, making it suitable for regulated industries and sustainable operations
  • Versatile metric sizing with M12 thread and 17mm height, ideal for a wide range of machinery and equipment applications

Professional Applications & Engineering Value

This M12 flange nut is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in demanding settings. Made from black-oxide steel, it offers excellent protection against rust and wear, making it ideal for automotive assemblies, construction machinery, and outdoor equipment. The coarse thread with Class 6G precision ensures quick, secure fastening even in high-vibration environments, reducing maintenance downtime. Its 27mm flange diameter distributes clamping force evenly, preventing damage to soft materials and enhancing joint integrity. Suitable for metric systems, this nut provides a reliable, long-lasting solution for heavy-duty applications where performance and compliance are critical.

Specification Summary & Compliance

This flange nut adheres to metric coarse thread standards with M12 size, 1.75mm pitch, and Class 6G thread fit for precise tolerance. It meets RoHS 3 (2015/863/EU) compliance under exemption 6(a) for lead as an alloying element in steel, ensuring environmental safety. Dimensions include a 19mm width, 17mm height, 27mm flange diameter, and 4mm flange thickness, manufactured to consistent industrial specifications for reliable performance in various engineering applications.

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