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

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Description & Features

This steel adapter features a tee configuration, designed for branching connections in hydraulic, instrumentation, and chemical processing systems.

The Eaton Aeroquip adapter features a 9/16-18 Male SAE O-Ring Boss (Straight Thread O-Ring) branch connection, along with a 9/16-18 Male JIC 37 deg Flare run connection. It measures 1.25 inches (A) and 1.06 inches (B) in key dimensions.

SKU: 203003-6-6S

Supplier Part Number (MPN): 203003-6-6S

Alternate Part Numbers: C1AX59, MI-00319660, MINO-00015F65542

Specifications

a Dimensions
1-1/4 in
b 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, SAE ORB
Connection Type 1
SAE ORB
Connection Type 2
Male SAE 37 deg JIC Flare
Connection Type 3
SAE ORB
Dimension Standards
SAE 070429/J1926/J514
Dimensions
2.12 in L
Drop Dimensions
1-1/4 in
Finish
Dura-Kote™
Fitting Type
Tee
Hex Size
0.69 in, 0.38 in
Material
Steel
Material Construction
Carbon Steel
Operating Temperature
-40 to 250 deg F
Seal Material
NBR
Series
203003 Series
Thread Size
9/16-18
Tube OD
3/8 in

Product Questions & Answers (1)

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Question by: Wade B on Oct 19, 2025, 8:46 PM
got a tee adapter here, but i need to know, are both ends 9/16-18 and what styles are they?
Answer by: Customer Support on Oct 21, 2025, 7:54 AM
Function-wise, it is a steel tee adapter that ties together two different connection styles at the same 9/16-18 thread size. The branch side is a 9/16-18 male SAE O-Ring Boss (straight thread O-ring) connection, and the run side is a 9/16-18 male JIC 37 degree flare connection.

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