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FD90 Series SAE J1502 Interchange Diagnostic Quick Disconnect, Male Half, -04 Coupling, 1/4-18 Male NPT

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Description & Features

The Danfoss Power Solutions FD90 Series diagnostic quick disconnect couplings are engineered for precise diagnostic pressure testing in hydraulic systems. This male half coupling features a -04 size and 1/4-18 NPT threading, ensuring secure and reliable connections.

It boasts an automatic sleeve for effortless single-hand push-to-connect engagement, and its flush face valving design minimizes fluid loss and air inclusion. The self-sealing valve allows disconnection under pressures up to 500 psi, while the Zinc plated steel body ensures durability.

Buna-N is used for standard sealing material, providing robust resistance to various fluids. The FD90 Series offers a broad range of configurations, enhancing system accessibility. Always refer to ECCN EAR99 and UNSPSC 40183100 for compliance and categorization respectively.

MPN: FD90-1012-04-04

Supplier Part Number: FD90-1012-04-04

Specifications

A
1.49
Air Inclusion Max
0.02 Cubic_centimeter
Application
Diagnostic pressure testing for hydraulic systems
Coupling Size
-04
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
End Gender 1
13554
End Gender 2
13556
End Size 2
0.25
End Type 1
Push to Connect
End Type 2
NPTF
Fluid Loss
0.10 Cubic_centimeter
Minimum Working Temperature
-40
Safety locking Mechanism
Sleeve lock
Seal Material
Buna-N
Supplier Part Number
FD90-1012-04-04
Thread 1
1/4-18
Thread Sealant
No
Alternate Part Numbers
Alternate Part Number C1CU36, Alternate Part Number MI-00298656, Alternate Part Number MINO-00015X11183, Alternate Part Number MINO-00402F47088
Product Weight
0.07 lbs

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Product Questions & Answers (4)

Question by: Lance M on Mar 13, 2026, 2:40 PM
Reckon this fitting would work for diagnostic testing on my tractor's hydraulics?
Answer by: Customer Support on Mar 15, 2026, 6:31 AM
Absolutely, these FD90 series quick disconnects are made for diagnostic pressure testing of hydraulic systems.
Question by: Duane R on Jun 25, 2025, 6:38 PM
does this thing work for checking pressure on a hydraulic system without having to crack a line open? asking because we do a lot of diagnostic work and fluid loss is always a headache
Answer by: Customer Support on Jun 26, 2025, 7:45 PM
Flush face valving on this coupling keeps fluid loss down to 0.10 cubic centimeter per connection cycle, and air inclusion stays at 0.02 cubic centimeter. That makes it well suited for diagnostic pressure testing without the mess and air contamination you get from cracking lines. The push-to-connect sleeve locks with one hand, so you can get in and out of tight spots without needing two people on the job.
Question by: Dwayne W on Mar 3, 2026, 12:07 PM
Will this fitting hold up for hydraulic diagnostic work on farm equipment?
Answer by: Customer Support on Mar 5, 2026, 11:07 AM
This FD90 series coupling is designed specifically for diagnostic pressure testing in hydraulic systems, which would include farm equipment. It's rated to handle disconnection under pressure up to 500 psi.
Question by: Keith F on Jan 19, 2026, 8:41 PM
does this thing disconnect under pressure or do you have to bleed the system down first before pulling it apart
Answer by: Customer Support on Jan 21, 2026, 6:42 AM
You can disconnect it under pressure, up to 500 psi. The self-sealing valve handles that without needing to relieve the system first. Fluid loss on disconnect is minimal too, rated at 0.10 cubic centimeters, so you're not making a mess every time you pull it.