S-93590A321 M4 x 12 mm Coupling Nuts

Coupling Nuts

0985FA00021 Coupling Nuts
0985FA00021 Coupling Nuts

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

Part No.
Part No. 0985FA00021
Equivalent to mcmaster :
93590A321

Basic Information

System of Measurement Metric
Nut Type Coupling, Hex

Dimension Parameters

Width 7 mm
Length 12 mm

Thread Parameters

Thread Type Metric
Thread Size M4
Threading Fully Threaded
Thread Direction Right Hand
Thread Pitch 0.7 mm
Thread Spacing Coarse
Thread Fit Class 6H

Head Parameters

Drive Style External Hex
Coupling Nut Profile Standard

Material & Strength Parameters

Material Black-Oxide 18-8 Stainless Steel

Finish & Compliance Parameters

RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (01/17/2023, 233 SVHC) Compliant
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 with Black-Oxide coating on 18-8 stainless steel, ideal for harsh industrial environments.
  • Precise thread engagement with Class 6H fit, ensuring reliable connections and reducing the risk of cross-threading.
  • Full threading design allows for maximum adjustability and secure fastening across the entire length.
  • External hex drive provides easy installation and removal with standard tools, improving assembly efficiency.
  • Coarse metric threading (M4 x 0.7mm) offers quick assembly and high vibration resistance in dynamic applications.
  • Compliance with RoHS 3 and REACH ensures environmental safety and meets global regulatory standards for industrial use.
  • Durable 18-8 stainless steel construction delivers long-term strength and reliability under mechanical stress.

Professional Applications & Engineering Value

This M4 coupling nut is engineered to solve common connectivity challenges in industrial assemblies, such as joining threaded rods or extending fasteners in tight spaces. The Black-Oxide 18-8 Stainless Steel material provides excellent corrosion resistance, making it suitable for applications exposed to moisture, chemicals, or outdoor conditions. With a fully threaded, right-hand metric design and coarse 0.7mm pitch, it ensures rapid installation and maintains integrity in high-vibration settings like machinery, automotive systems, and structural frameworks. The external hex drive allows for straightforward torque application, reducing assembly time and minimizing tool slippage. Ideal for metric-based projects, this nut delivers consistent performance in demanding environments where durability and precision are critical.

Specification Summary & Compliance

This coupling nut features M4 metric threading with a 0.7mm coarse pitch and Class 6H thread fit per ISO standards, ensuring dimensional accuracy and reliable performance. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety guidelines. The nut is fully threaded with a standard profile and right-hand direction, manufactured to meet industrial specifications for strength and durability.

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