S-94942A109 M16 DIN 6923, ISO 4161 Flange Nuts

Flange Nuts

1231FA00020 Flange Nuts
1231FA00020 Flange Nuts

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

Part No.
Part No. 1231FA00020
Equivalent to mcmaster :
94942A109

Basic Information

System of Measurement Metric
Nut Type Flange, Hex
Specifications Met DIN 6923, ISO 4161

Dimension Parameters

Width 24 mm
Height 16 mm

Thread Parameters

Thread Type Metric
Thread Size M16
Thread Direction Right Hand
Thread Pitch 1.5 mm
Thread Spacing Fine
Thread Fit Class 6H

Head Parameters

Drive Style External Hex
Hex Nut Profile Standard

Flange Parameters

Flange Diameter 34.5 mm
Flange Thickness 2.4 mm

Material & Strength Parameters

Material Black-Phosphate Steel
Strength Class Class 10

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (07/08/2021, 219 SVHC) Compliant
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 34.5mm flange provides a wider bearing surface, reducing surface pressure and preventing damage to connected materials.
  • Superior Corrosion Resistance – Black-phosphate steel coating offers excellent protection against rust and wear in harsh industrial environments.
  • High-Strength Performance – Class 10 strength rating ensures reliable clamping force and resistance to vibration loosening in heavy-duty applications.
  • Precision Thread Fit – Class 6H fine thread (1.5mm pitch) ensures smooth engagement, secure fastening, and minimized risk of cross-threading.
  • Standard Compliance & Interchangeability – Manufactured to DIN 6923 and ISO 4161 standards, guaranteeing dimensional accuracy and compatibility with metric bolt systems.
  • Easy Installation & Removal – Standard external hex drive (24mm width) allows for straightforward tool access and efficient assembly or disassembly.
  • Environmental & Safety Compliance – REACH and RoHS 3 compliant, ensuring safe use and adherence to international environmental regulations.

Professional Applications & Engineering Value

This M16 flange nut is engineered to address critical challenges in industrial assembly, where vibration resistance, corrosion protection, and consistent clamping force are paramount. The black-phosphate steel construction, combined with a fine thread pitch of 1.5mm, ensures secure, long-lasting fastening in high-stress environments such as heavy machinery, automotive systems, and structural frameworks. The integrated 34.5mm flange eliminates the need for separate washers, distributing load evenly and reducing point stress—ideal for applications requiring repeated adjustments or exposure to dynamic forces. By conforming to DIN 6923 and ISO 4161 standards, this nut delivers reliable performance and interchangeability, making it a trusted choice for engineers and maintenance teams seeking durability and compliance in metric fastener systems.

Specification Summary & Compliance

This flange nut features M16 x 1.5mm fine metric thread with Class 6H thread fit tolerance, ensuring precise engagement and consistent performance. It adheres to manufacturing specifications per DIN 6923 and ISO 4161, with a flange diameter of 34.5mm and thickness of 2.4mm. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) directives, confirming its safety and environmental standards for industrial use worldwide.

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