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Steel Adapter, 1/4-18 Male NPT Run To 1/4-18 Female NPT Branch, Tee

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Description & Features

Part of the Eaton Aeroquip 2256 Series, this Steel Adapter, 1/4-18 Male NPT Run To 1/4-18 Female NPT Branch, Tee provides a compact tee configuration with NPTF external and internal pipe thread connections at the 1/4-18 thread size. Constructed in steel, it is suited for hydraulic line routing where a run-and-branch split is needed within a confined envelope, overall dimensions measure 1.11 inches on the A dimension and 0.88 inches on the B dimension.

The NPTF thread form ensures a pressure-tight mechanical seal without relying solely on thread sealant, making this adapter appropriate for hydraulic fluid circuits where leak-free connections are a priority. The tee geometry allows the main line to continue through the run ports while a branch port feeds an additional circuit leg.

SKU: 2256-4-4S

Supplier Part Number (MPN): 2256-4-4S

Alternate Part Numbers: C1BD66, MI-00298937, MINO-00015F47368

Specifications

A
1.11
Alternate Part Numbers
Alternate Part Number C1BD66, Alternate Part Number MI-00298937, Alternate Part Number MINO-00015F47368
B
0.88
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
End Gender 1
13554
End Gender 2
13556
End Gender 3
13557
End Size 1
0.25
End Size 2
0.25
End Size 3
0.25
End Type 1
NPTF
End Type 2
NPTF
End Type 3
NPTF
Minimum Working Temperature
-65
Supplier Part Number
2256-4-4S
Thread 1
1/4-18
Thread 2
1/4-18
Thread Sealant
No
Product Weight
0.20 lbs

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Product Questions & Answers (3)

Question by: Freddie S on Sep 18, 2025, 2:08 PM
Got a spot on a hydraulic manifold where I need to pull a branch line off without breaking the main run. This tee the right kind of fitting for that?
Answer by: Customer Support on Sep 20, 2025, 6:56 AM
That's exactly what this fitting is built for. The run ports are both 1/4-18 male NPT, so the main line passes straight through, and the branch port is 1/4-18 female NPT for your side connection. Steel construction keeps it solid in hydraulic line work where brass wouldn't hold up as well. As long as your thread sizes match up on all three connections, this handles that split without interrupting the run.
Question by: Todd M on Mar 3, 2026, 11:03 AM
Will this tee fitting work okay for hooking up a pressure gauge to my hydraulic line?
Answer by: Customer Support on Mar 4, 2026, 5:25 PM
For adding a pressure gauge, this tee adapter should do the trick. Its 1/4-18 NPTF connections should allow for a solid, leak-free connection in your hydraulic system.
Question by: Dwight B on Jul 1, 2025, 8:03 AM
trying to tee off a 1/4 pipe line, is this the one with a male run and a female branch?
Answer by: Customer Support on Jul 2, 2025, 6:54 PM
Function-wise it is a tee adapter with a 1/4-18 male NPT run and a 1/4-18 female NPT branch, so it’s meant for splitting a line where the straight-through side is male and the side port is female.