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FD42 Series, Pioneer 4000 Interchange Quick Disconnect, Male Half, -04 Coupling, 1/4-18 Female NPT

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Description & Features

The Danfoss / Eaton Hansen FD42 Series Quick Disconnect Couplings Plug ensures efficient and reliable fluid transfer in hydraulic applications. Craft-built with a self-sealing poppet valve design it delivers excellent high and low-pressure sealing. Featuring a PTFE back-up ring in the female half this coupling significantly boosts impulse life.

A notable push-pull ball latch design facilitates quick and easy connection and disconnection of hose lines. The male half can be bulkhead mounted using an optional adapter. The standard body material is zinc plated steel providing enduring durability.

The FD42 Series Pioneer 4000 Interchange Quick Disconnect Male Half -04 Coupling 1/4-18 Female NPT interchanges with Pioneer 4000-2 and Safeway S20-A. It also includes a retaining groove on the female half for seamless bulkhead mounting. The product operates efficiently in extreme temperatures with a minimum working temperature of -40 degrees Celsius ensuring reliability in diverse conditions.

Featuring Buna-N standard seal material this quick disconnect coupling is optimal for hydraulic tools and fluid transfer systems ensuring robust performance and longevity.

MPN: C1FK53

Supplier Part Number: FD42-1002-04-04

Specifications

A
1.34
Application
Hydraulic tool (HTMA interchange), Hydraulic and fluid transfer
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
13555
End Size 2
0.25
End Type 1
Push to Connect
End Type 2
NPT
Minimum Working Temperature
-40
Seal Material
Buna-N
Supplier Part Number
FD42-1002-04-04
Thread 1
1/4-18
Thread Sealant
No
Alternate Part Numbers
Alternate Part Number C1FK53, Alternate Part Number MI-02503607, Alternate Part Number MINO-00402F52293
Product Weight
0.10 lbs

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Model Number Coupling Size Thread 1 Seal Material A Price Action
FD42 Series, Pioneer 4000 Interchange Quick Disconnect, Male Half, -04 Coupling, 1/4-18 Female NPT

FD42-1002-04-04 FD42 Series NPT QD

-04

1/4-18

Buna-N

1.34

Product Questions & Answers (3)

Question by: Duane O on Mar 18, 2026, 9:02 AM
Trying to swap out an old Pioneer 4000-2 plug, is this FD42 male half gonna hook right up?
Answer by: Customer Support on Mar 20, 2026, 6:29 AM
It is a Pioneer 4000 interchange style male half. It is listed as interchanging with Pioneer 4000-2 and Safeway S20-A, and this one has a 1/4-18 female NPT thread with a -04 coupling size.
Question by: Harvey R on Dec 7, 2025, 7:20 PM
Will this work to replace a Pioneer 4000-2 fitting?
Answer by: Customer Support on Dec 9, 2025, 5:28 PM
Yes sir, this FD42 series male half interchange quick disconnect is made to work as a replacement for the Pioneer 4000-2. It also swaps with the Safeway S20-A.
Question by: Darryl B on Oct 25, 2025, 6:13 AM
Does this coupling interchange with Pioneer 4000-2, or do I need something different for that application?
Answer by: Customer Support on Oct 27, 2025, 6:49 AM
it's a direct interchange for both Pioneer 4000-2 and Safeway S20-A, so you won't need a different fitting. The push-pull ball latch design on these FD42 units connects and disconnects the same way you'd expect from those Pioneer couplings, and the self-sealing poppet valve keeps things tight on both ends whether you're under high or low pressure. Body is zinc plated steel with zinc poppet guides, and the standard seal is Buna-N, so just make sure that seal material works with whatever fluid you're running.