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Steel Adapter, 9/16-18 Male SAE O-Ring Boss (Straight Thread O-Ring) Run To 9/16-18 Male JIC 37 deg Flare Run & Branch, Tee

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Description & Features

This Aeroquip tee adapter is a steel adapter with 9/16-18 Male SAE O-Ring Boss (Straight Thread O-Ring) run to 9/16-18 Male JIC 37 deg Flare run & branch.

It is designed for hydraulic, instrumentation, and chemical processing systems. The adapter features male connections on all three ends, each with a 0.5625-inch end size and 9/16-18 thread.

This straight thread O-Ring to 37° Flare Steel Adapters product, catalog number C1AX64, is zinc plated steel and has a drop dimension of 1.0600. It is designed to withstand a minimum working temperature of -40 degrees. The seal part, if included, is 22617-6.

SKU: 203005-6-6S

Supplier Part Number (MPN): 203005-6-6S

Alternate Part Numbers: C1AX64, MI-00319409, MINO-00015F65430

Specifications

a Dimensions
1-1/4 in
b Dimensions
1.06 in
c Dimensions
1.06 in
Connection Size 1
3/8 in
Connection Size 2
3/8 in
Connection Size 3
3/8 in
Connection Type
Male JIC, Male SAE ORB
Connection Type 1
Male SAE Adjustable ORB
Connection Type 2
Male SAE 37 deg JIC Flare
Connection Type 3
Male SAE 37 deg JIC Flare
Dimension Standards
SAE 070428/J1926/J514
Dimensions
2.31 in L
Drop Dimensions
1.06 in
Finish
Dura-Kote™
Fitting Type
Tee
Hex Size
11/16 in
Material
Steel
Material Construction
Carbon Steel
Operating Temperature
-40 to 250 deg F
Seal Material
NBR
Series
203005 Series
Thread Size
9/16-18
Tube OD
3/8 in

Product Questions & Answers (4)

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Question by: Ralph B on Feb 21, 2026, 6:43 AM
trying to replace a tee i busted, are all three ends on this one 9/16-18 male?
Answer by: Customer Support on Feb 22, 2026, 4:48 PM
All three ports are male with 9/16-18 threads. It is a tee with a run and branch, and each end is listed at 0.5625 size with 9/16-18 threads.
Question by: Shawn R on Jun 18, 2025, 7:44 PM
got a hose setup with 9/16-18 JIC ends, will this tee let me add a branch off that line?
Answer by: Customer Support on Jun 20, 2025, 8:53 AM
Function-wise, it is a tee adapter that gives you a run and a branch using 9/16-18 male JIC 37 degree flare connections, with the third leg being 9/16-18 male SAE O-ring boss (straight thread O-ring). It’s meant for tying a branch line into a run in hydraulic, instrumentation, or chemical processing systems.
Question by: Steve T on Dec 1, 2025, 3:52 PM
got a port on my manifold that's 9/16-18 SAE O-ring boss and I need to split off a JIC line from it. this tee gonna work for that?
Answer by: Customer Support on Dec 3, 2025, 6:48 AM
That's exactly the setup this fitting is built for. One end threads into your O-ring boss port, and the two JIC male ends give you the 37 degree flare connections you need to branch off from there. All three connection points are 9/16-18, so the thread size stays consistent across the run and branch. Zinc plated steel construction, made by Eaton Aeroquip under their 203005 series. Solid choice for hydraulic, instrumentation, or chemical processing lines.
Question by: Merle S on Oct 17, 2025, 1:52 PM
Hey, will this here tee adapter work alright for hooking up some hydraulic lines in my tractor?
Answer by: Customer Support on Oct 19, 2025, 1:34 PM
This tee adapter is designed for hydraulic, instrumentation, and chemical processing systems, so it should be suitable for your tractor's hydraulic lines.

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