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Steel Adapter, 1/4-18 Male NPT To 1/4-18 Female NPT, Straight

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Description & Features

Manufactured by Eaton Aeroquip as part of the 2040 Series, this Steel Adapter, 1/4-18 Male NPT To 1/4-18 Female NPT, Straight provides a reliable same-size inline connection for grease, instrumentation, and most hydraulic system applications. The straight configuration maintains a clean, direct flow path without angular offset, making it well suited for space-constrained installations where alignment is critical.

Constructed from steel with NPTF threads on both ends, the adapter delivers secure, leak-resistant seating. The countersunk hex design allows for standard wrench engagement during installation. With an overall length (A dimension) of 1.39 inches, this compact fitting integrates readily into existing assemblies without adding significant length to the connection point.

SKU: 2040-4-4S

Supplier Part Number (MPN): 2040-4-4S

Alternate Part Numbers: C1AY32, MI-00327456, MINO-00015F68451

Specifications

A
1.39
Alternate Part Numbers
Alternate Part Number C1AY32, Alternate Part Number MI-00327456, Alternate Part Number MINO-00015F68451
Application
Other - Grease, instrumentation, and most hydraulic systems
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 1
0.25
End Size 2
0.25
End Type 1
NPTF
End Type 2
NPTF
Minimum Working Temperature
-65
Supplier Part Number
2040-4-4S
Thread 1
1/4-18
Thread 2
1/4-18
Thread Sealant
No
Tube I.D. 1
0.28
Product Weight
0.09 lbs

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Product Questions & Answers (2)

Question by: Floyd A on Sep 16, 2025, 1:26 PM
Been looking for a straight pipe-to-pipe adapter for some instrumentation lines we got running off a hydraulic manifold. This a 1/4 NPT male on one end and female on the other, or am I reading that wrong?
Answer by: Customer Support on Sep 18, 2025, 6:20 AM
You're reading it right. One end is 1/4-18 male NPT and the other is 1/4-18 female NPT, both straight through with no size reduction. It's a pass-through style adapter, so it's useful when you need to extend a line, change a fitting orientation, or bridge a gap between components that can't connect directly. Grease systems, instrumentation lines, and general hydraulic setups all fall within what this part is rated for.
Question by: Larry B on Jun 28, 2025, 10:24 AM
Will this here adapter work for hooking up some grease lines?
Answer by: Customer Support on Jun 29, 2025, 2:44 PM
this adapter can be used in grease applications as well as instrumentation and most hydraulic systems.