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1000/400/500 Series MIL-C-4109 Industrial Interchange Air Quick Disconnect, Male Half, -04 Coupling, 1/4-18 Male NPT

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Description & Features

The 1000/400/500 Series MIL-C-4109 Industrial Interchange Air Quick Disconnect, Male Half, -04 Coupling, 1/4-18 Male NPT by Danfoss Power Solutions (ii Llc Aeroquip) is designed for industrial breathing air and general pneumatics applications. Featuring an automatic sleeve for single-hand push-to-connect operation, this quick disconnect coupling includes a protective collar to prevent accidental disconnection.

With a temperature range of -40deg;F and a standard body material of brass, this coupling meets dimensional requirements of MIL-C-4109, ensuring interchangeability. The pin latching mechanism and the 360deg; swivel design help eliminate hose kinking. Additionally, the standard seal material is Buna-N, providing reliable performance.

Its maximum operating pressure varies among different models: 500 PSI for Aeroquip, 360 PSI for Oetiker, and 300 PSI for Milton and Dixon. The rust-resistant brass construction further enhances durability, making it well-suited for maintenance, repair, and fluid transfer tasks.

Supplier Part Number: 10

Specifications

Brand
Aeroquip® by Danfoss
a Dimensions
1-3/4 in
Angle Shape
Straight
Connection Size 1
1/4 in
Connection Size 2
1/4 in
Connection Style
Manual
Connection Type
Male Quick-Disconnect, MNPT
Connection Type 1
Male NPTF
Connection Type 2
Male Quick Disconnect
Dimensions
1.75 in L x 0.62 in W x 0.62 in H
Finish
Zinc-Plated
Fitting Type
Coupling
For Use With
Compressed Air, Gases and Liquids
Hex Size
0.563 in
Latch Type
Push/Pull
Material
Steel
Material Construction
Carbon Steel
Operating Temperature
-40 to 250 deg F
Safety Locking Mechanism
Sleeve Lock
Seal Material
Nitrile
Series
1000 Series
Thread Sealant
Without Thread Sealant
Thread Size
1/4-18
Valve Type
2-Way

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Product Questions & Answers (3)

Question by: Roger W on Dec 30, 2025, 3:46 PM
got a worn out quick disconnect on my air compressor setup, would this male half with the 1/4-18 npt fit right in as a swap?
Answer by: Customer Support on Jan 1, 2026, 1:27 PM
It matches up with standard industrial interchange designs under MIL-C-4109, so yeah, it'll plug into compatible female halves for air applications, especially if your current one's from Danfoss or Eaton Hansen in those series.
Question by: Daryl H on Oct 16, 2025, 11:48 AM
Does this quick disconnect work with standard air hoses?
Answer by: Customer Support on Oct 18, 2025, 6:18 AM
Yes, this male half quick disconnect with a 1/4-18 Male NPT fitting is compatible with standard air hoses that support the same size and thread type. It's designed for ease of use in various industrial applications, making it a reliable choice for your air system needs.
Question by: Howard A on Aug 14, 2025, 7:52 AM
Will this plug fit standard air hose fittings?
Answer by: Customer Support on Aug 16, 2025, 6:03 AM
This male half quick disconnect is made to the MIL-C-4109 industrial interchange standard, so it should work with any female coupler also made to that spec. Just make sure the size (-04) and thread (1/4-18 Male NPT) are compatible with your existing setup.

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