S-90477A124 M16 Flange Nuts

Flange Nuts

1209FA00021 Flange Nuts
1209FA00021 Flange Nuts

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

Part No.
Part No. 1209FA00021
Equivalent to mcmaster :
90477A124

Basic Information

System of Measurement Metric
Nut Type Flange, Hex
Performance Properties Rotating

Dimension Parameters

Width 27 mm
Height 23 mm

Thread Parameters

Thread Type Metric
Thread Size M16
Thread Direction Right Hand
Thread Pitch 2 mm
Thread Spacing Coarse
Thread Fit Class 6H

Head Parameters

Drive Style External Hex
Hex Nut Profile Standard

Flange Parameters

Flange Diameter 34.9 mm
Flange Thickness 6.4 mm
Flange Material Steel

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 - The 34.9 mm flange diameter spreads clamping force over a wider area, reducing surface pressure and preventing damage to assembled materials.
  • Superior Corrosion Resistance - Black-oxide steel finish provides a durable protective layer, extending service life in demanding industrial environments.
  • Reliable Thread Engagement - Class 6H thread fit ensures precise, secure mating with bolts, minimizing the risk of loosening under vibration.
  • Quick Installation - Coarse M16x2mm metric thread allows for faster assembly compared to fine-pitch alternatives, boosting productivity.
  • Optimized for Dynamic Applications - Rotating performance design maintains integrity in moving parts, ideal for machinery requiring consistent torque retention.
  • Secure Torque Transfer - External hex drive with 27 mm width offers excellent grip for standard wrenches, enabling precise tightening without slippage.
  • Environmental Compliance - Meets RoHS 3 (2015/863/EU) standards with exemption 6(a), ensuring safe use in regulated industries.

Professional Applications & Engineering Value

This heavy-duty M16 flange nut is engineered to address common industrial challenges like vibration-induced loosening and material fatigue. The black-oxide steel construction provides a robust barrier against rust and wear, making it suitable for outdoor equipment, automotive assemblies, and machinery exposed to harsh conditions. Its 34.9 mm flange diameter and 6.4 mm thickness enhance stability by distributing load evenly, preventing joint failure in high-stress applications. With Class 6H metric thread precision and coarse M16x2mm spacing, it ensures quick, reliable fastening in construction, manufacturing, and maintenance projects, reducing downtime and improving operational safety.

Specification Summary & Compliance

This flange nut adheres to metric standards with an M16x2mm coarse thread and Class 6H thread fit for consistent accuracy. The external hex drive (27 mm width) and standard hex nut profile facilitate easy installation. It is RoHS 3 (2015/863/EU) compliant with exemption 6(a) for lead as an alloying element in steel, meeting environmental regulations without compromising performance.

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