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Steel Adapter, 1/4-18 Male NPT Run To 7/16-20 Male JIC 37 deg Flare Run & Branch, Tee

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Description & Features

Manufactured by Eaton Aeroquip and built from steel, this tee-configuration adapter connects a 1/4-18 Male NPT run port to a 7/16-20 Male JIC 37-degree flare run and branch. The Steel Adapter, 1/4-18 Male NPT Run To 7/16-20 Male JIC 37 Deg Flare Run & Branch, Tee is part of the Eaton Aeroquip 2028 Series and is designed for use in hydraulic, instrumentation, and chemical processing systems where a reliable transition between NPT and JIC flare connections is required.

The tee configuration allows simultaneous run and branch connections from a single fitting body, making it well suited for circuits that require a fluid split or junction point. With overall dimensions of 1.09 in. (A), 1.05 in. (B), and 1.05 in. (C), this is a compact fitting appropriate for tight installation envelopes. The catalog reference for this part is C1AX39.

SKU: 2028-4-4S

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

Alternate Part Numbers: C1AX39, MI-00313772, MINO-00015F62326

Specifications

a Dimensions
1.09 in
b Dimensions
1.05 in
c Dimensions
1.05 in
Connection Size 1
1/4 in
Connection Size 2
1/4 in
Connection Type
Male JIC, MNPT
Connection Type 1
Male SAE 37 deg JIC Flare
Connection Type 2
Male SAE 37 deg JIC Flare
Connection Type 3
Male NPTF
Dimension Standards
SAE 070424/J514
Dimensions
2.14 in L
Drop Dimensions
1.05 in
Finish
Dura-Kote™
Fitting Type
Tee
Material
Steel
Material Construction
Carbon Steel
Operating Temperature
-65
Series
2028 Series
Thread Size
7/16-20, 1/4-18
Tube OD
1/4 in

Product Questions & Answers (3)

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Question by: Dwayne B on Feb 10, 2026, 9:40 PM
trying to tie a 1/4-18 pipe port into a 7/16-20 JIC line, is this the tee that does it?
Answer by: Customer Support on Feb 12, 2026, 9:41 AM
Function-wise, it is a steel tee adapter that takes a 1/4-18 male NPTF on the run and gives you 7/16-20 male JIC 37 degree flare connections for the run and the branch.
Question by: Wes P on Feb 15, 2026, 3:27 PM
got a tee fitting here with 1/4-18 male npt on one side and 7/16-20 male jic on the other, is that what this 2028-4-4S actually is?
Answer by: Customer Support on Feb 17, 2026, 6:08 AM
In plain terms, it is a steel tee adapter in the Eaton Aeroquip 2028 series that connects external pipe thread (1/4-18 male NPT) to 37 degree flare JIC (7/16-20 male) on the run and the branch.
Question by: Freddie S on Nov 5, 2025, 8:34 PM
Will this tee fitting hold up in a hydraulic system on farm equipment?
Answer by: Customer Support on Nov 7, 2025, 8:00 AM
Eaton Aeroquip designs this tee adapter for hydraulic, instrumentation, and chemical processing systems, so it should be suitable for your farm equipment's hydraulic setup.

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