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DANFOSS / EATON 3/8 MCOUPX1/2MNPT

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Description & Features

The Danfoss / Eaton Hansen 400 Series Quick Disconnect Couplings Plug is expertly designed for a range of industrial applications including general pneumatics construction and fluid transfer. This coupling plug features an efficient quick connect and disconnect mechanism that operates without the need for special tools making it a practical choice for various environments.

Manufactured from durable carbon steel this plug ensures robust performance under challenging conditions exceeding ISO 16028 operating pressures. The carbon steel construction also provides reliability and longevity crucial for demanding industrial settings.

Designed with a push-to-connect end type and a male NPTF connection it simplifies attachment to fluid systems. The internal ball lock connection type and sleeve lock safety mechanism promote secure and stable connections enhancing operational safety and efficiency.

Minimum working temperature for this coupling plug is -40F making it suitable for environments with extreme temperatures. The seal is made of Buna-N material ensuring compatibility with various fluids.

MPN: 44

Supplier Part Number: 44

Specifications

Brand
Danfoss
Connection Size 1
3/8 in
Connection Size 2
1/2 in
Connection Style
Manual
Connection Type
MNPT, Push-Fit
Connection Type 1
Male Push-to-Connect
Connection Type 2
Male NPTF
Dimensions
2.09 in L x 1.01 in W x 1.01 in H
Finish
Zinc
Fitting Type
Coupling
Fluid Compatibility
Compressed Air, Gases and Liquids
Hex Size
7/8 in
Latch Type
Push/Pull
Material
Steel
Material Construction
Carbon Steel
Maximum Operating Pressure
1000 psi
nmfc
50
Operating Temperature
-40 to 250 deg F
Safety Locking Mechanism
Sleeve Lock
Seal Material
NBR
Series
400 Series
Thread Size
1/2-14
Valve Type
2-Way

Product Questions & Answers (3)

Question by: Eddie A on Feb 16, 2026, 10:15 AM
Will this plug work with other quick disconnects, or is it just for Danfoss/Eaton stuff?
Answer by: Customer Support on Feb 18, 2026, 6:26 AM
This plug is designed for quick connection and disconnection in various industrial applications, including pneumatics, construction, and fluid transfer, and is part of the Hansen 400 series.
Question by: Pete C on Oct 24, 2025, 9:06 PM
does this plug work down to negative 40 degrees? got equipment runnin in some pretty cold conditions and need somethin that wont give out on me
Answer by: Customer Support on Oct 26, 2025, 6:24 AM
Rated for a minimum working temperature of -40F, so cold-weather use is well within what this coupling is built for. The Buna-N seal holds up across that range, and the carbon steel body is solid enough to take the stress that comes with temperature swings in tough outdoor or unheated environments.
Question by: Harold P on Mar 24, 2026, 9:01 AM
got a 1/2 male nptf port on my line. is this plug the one that threads in there?
Answer by: Customer Support on Mar 26, 2026, 6:23 AM
The threaded end on this plug is 1/2 inch male NPTF, so it’s meant to screw into a 1/2 NPTF female port. The other end is a push to connect style quick disconnect plug.

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