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Steel Adapter, 1/4-18 Male NPT Run To 9/16-18 Male JIC 37 deg Flare Run & Branch, Tee

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Description & Features

Part of the Eaton Aeroquip 2028 Series, this Steel Adapter, 1/4-18 Male NPT Run To 9/16-18 Male JIC 37 deg Flare Run & Branch, Tee provides a tee configuration that connects male NPT and male JIC 37° flare threads in a single fitting. Constructed from steel, it is suited for hydraulic, instrumentation, and chemical processing system applications where a reliable branch connection is needed between NPT and JIC flare line ends.

With overall dimensions of 1.09 in. (A), 1.06 in. (B), and 1.06 in. (C), this compact tee adapter is designed for space-conscious installations. The Eaton Aeroquip catalog reference for this fitting is C1AX40.

SKU: 2028-4-6S

Supplier Part Number (MPN): 2028-4-6S

Alternate Part Numbers: C1AX40, MI-00313786, MINO-00015F62330

Specifications

A
1.09
Alternate Part Numbers
Alternate Part Number C1AX40, Alternate Part Number MI-00313786, Alternate Part Number MINO-00015F62330
Application
Other - Hydraulic, instrumentation, and chemical processing systems
B
1.06
C
1.06
Drop Dimension
1.06
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
13558
End Size 1
0.25
End Size 2
0.56
End Size 3
0.56
End Type 1
NPTF
End Type 2
SAE 37
End Type 3
SAE 37
Minimum Working Temperature
-65
Supplier Part Number
2028-4-6S
Thread 1
1/4-18
Thread 2
9/16-18
Thread Sealant
No
Tube O.D.
0.38
Tube O.D.
0.38
Product Weight
1.70 lbs

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Product Questions & Answers (2)

Question by: Lyle R on Nov 25, 2025, 5:50 PM
Got a line running 1/4-18 NPT on one end and need to tee off to a 9/16-18 JIC fitting. This the right part for that?
Answer by: Customer Support on Nov 27, 2025, 6:04 AM
That's what this adapter is built for. The run ports are 1/4-18 male NPT and the branch comes off at 9/16-18 male JIC 37 degree flare, so you get a tee configuration that bridges those two thread types in one piece. It's a steel adapter from Eaton Aeroquip's 2028 series, so the construction is solid for hydraulic line work.
Question by: Jean W on Jan 26, 2026, 6:43 AM
got a setup with 1/4-18 male npt and i need to tee off into jic, is this the right adapter?
Answer by: Customer Support on Jan 27, 2026, 4:45 PM
For tying an external pipe thread into a 37 degree flare setup, this tee is built exactly for that. It has a 1/4-18 male NPT run connection and a 9/16-18 male JIC 37 degree flare run and branch, so it lets you create a tee while transitioning from NPT to JIC.