Danfoss 4000 Series FEM Brass Coupling

Description & Features

Designed for industrial fluid transfer, general pneumatics, maintenance and repair, and breathing air applications, the Danfoss 4000 Series FEM Brass Coupling is a 1/2 inch female half quick disconnect fitting built for reliable, tool-free connection and disconnection in demanding environments. The brass body resists corrosion across a wide range of media, while the Buna-N seal provides dependable performance from -40°F through standard operating conditions.

Connection is handled via a push-to-connect end type with a ball lock internal mechanism and sleeve lock safety, reducing accidental disconnection during use. The two-way valve configuration helps control flow during coupling and uncoupling. Compliant with US Industrial Interchange, ISO 6150 Series B, and A-A-59439 standards, this coupling is broadly compatible with common industrial quick disconnect systems. At 1.38 inches wide and rated to exceed ISO 16028 operating pressures, it suits both light-duty maintenance tasks and higher-demand fluid transfer setups.

SKU: 4400SL

Supplier Part Number (MPN): 4400SL

Specifications

Alternate Part Numbers
Alternate Part Number MINO-00015X06523
Application
Industrial Breathing Air, General Pneumatics, Maintenance & Repair, Fluid Transfer
Class
WEB-ITEM
Compliances
US Industrial Interchange|US Industrial Interchange, ISO 6150 Series B, A-A-59439
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
End Size 2
0.50
End Type 1
Push to Connect
Features
Quick connect and disconnect|No need for special tools|Exceeds ISO 16028 operating pressures
Flow Rate1
336.56 gallons per minute
ICC
Quick Disconnect Couplings
Internal Connection Type
Ball Lock
Item Type
Female Half
Language
English
Minimum Working Temperature
-40
Net Pack Quantity Units
EA
Port Size
1/2
Product Material
Brass
Product Width
1.38
Safety locking Mechanism
Sleeve lock
Seal Material
Buna-N
Sub Brand
Hansen
Supplier Part Number
4400SL
Valve Type
2 way
Product Weight
0.99 lbs

Product Questions & Answers (1)

Question by: Shane S on Jun 19, 2025, 7:54 PM
If I'm swapping out an old coupling, how can I be sure this Danfoss one will actually fit?
Answer by: Customer Support on Jun 21, 2025, 12:24 PM
This coupling follows US Industrial Interchange, ISO 6150 Series B, and A-A-59439 standards, so it should be broadly compatible with other quick disconnect systems built to those same standards. Just double-check that your existing setup also adheres to one of those.