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

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Description & Features

Ideal for grease, instrumentation, and various hydraulic systems, the Eaton Aeroquip Steel Adapter offers reliable performance in demanding environments. This adapter features a 1/4-18 male NPT branch and a 1/4-18 female NPT run, configured in a tee shape. Its robust construction ensures durability and long-lasting service, making it a trusted choice for industrial applications.

Engineered for precision, the adapter has dimensions of A: 1.09 inches and B: 0.88 inches, providing a secure and leak-free connection. Manufactured by Eaton, a leading brand in hydraulic solutions, this product is backed by a reputation for quality and innovation. The Eaton Aeroquip Steel Adapter is part of the 2091 Series, known for its versatility and compatibility with various systems.

SKU: 2091-4-4S

Supplier Part Number (MPN): 2091-4-4S

Alternate Part Numbers: C1BB44, MI-00325440, MINO-00015F67525

Specifications

A
1.09
Alternate Part Numbers
Alternate Part Number C1BB44, Alternate Part Number MI-00325440, Alternate Part Number MINO-00015F67525
Application
Other - Grease, instrumentation, and most hydraulic systems
B
0.88
Drop Dimension
1.09
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
End Gender 1
13553
End Gender 2
13555
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
2091-4-4S
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: Lance T on Jun 23, 2025, 11:39 AM
Will this tee adapter hold up okay in a grease system?
Answer by: Customer Support on Jun 24, 2025, 4:57 PM
This Eaton Aeroquip adapter is suitable for use in grease, instrumentation, and most hydraulic systems.
Question by: Duane H on Apr 28, 2025, 6:44 PM
Got a grease fitting line I'm trying to tee off of, this the right piece for a quarter-inch NPT setup?
Answer by: Customer Support on Apr 29, 2025, 8:24 PM
For a 1/4-18 NPT grease line, this fits right in. The branch port is 1/4-18 male NPT and the run ports are 1/4-18 female NPT, so you're splitting off a male-threaded branch into a female-threaded run. It's listed specifically for grease, instrumentation, and general hydraulic systems, so a grease line application is well within what this adapter handles. Eaton Aeroquip builds the 2091 series to NPTF spec on both the external and internal pipe threads, which helps with sealing on tapered pipe connections.
Question by: Larry R on Oct 7, 2025, 3:54 PM
trying to tee off a 1/4 npt line, is this one 1/4-18 male on the branch and 1/4-18 female on the run?
Answer by: Customer Support on Oct 9, 2025, 1:47 PM
Thread-wise, it’s a 2091 Series steel tee adapter with a 1/4-18 male NPT branch and a 1/4-18 female NPT run, using NPTF external pipe threads and NPTF internal pipe threads.