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Steel Adapter, 7/16-20 Female JIC 37 deg Flare To 9/16-18 Male JIC 37 deg Flare, Straight

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Description & Features

Designed for high-performance applications, the Brennan Industries steel adapter ensures reliable JIC connections by utilizing 7/16-20 female and 9/16-18 male threads. This straight 37deg; flare union is crafted for optimal durability and precision to meet rigorous industry standards. With a tube outer diameter of 0.38 inches, it offers a secure fit and seamless integration in critical systems. The absence of thread sealant makes it ideal for situations where direct metal-to-metal sealing is required.

Manufactured by Brennan Industries Inc., these adapters are engineered for compatibility and reliability, ensuring performance efficiency. The robust steel construction of this adapter provides resilience in demanding environments, making it suitable for applications requiring high pressure and temperature tolerances.

Model: 37deg; Flare Union Steel Adapters.

Supplier Part Number: 2406-04-06

Specifications

a Dimensions
1.01 in
Connection Size 1
1/4 in
Connection Size 2
3/8 in
Connection Type
Female JIC, Male JIC
Connection Type 1
Female SAE 37 deg JIC Flare
Connection Type 2
Male 37 deg JIC Flare
Dimension Standards
SAE J514
Dimensions
1.15 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Reducer
Hex Size
5/8 in
Material
Steel
Material Construction
AISI 12L14/C1045 Steel
Maximum Operating Pressure
6000 psi
Series
2406 Series
Thread Sealant
Without Thread Sealant
Thread Size
9/16-18, 7/16-20
Tube OD
3/8 in
Tube Outside Diameter
0.38 in

Product Questions & Answers (4)

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Question by: Terry H on Dec 2, 2025, 8:23 AM
got a hose end with 7/16-20 jic female on it, will this adapter give me a 9/16-18 jic male straight out?
Answer by: Customer Support on Dec 3, 2025, 5:33 PM
Function-wise, it is a straight 37 degree JIC flare union adapter that goes from 7/16-20 female JIC on one side to 9/16-18 male JIC on the other.
Question by: Lynn P on Mar 22, 2026, 4:29 PM
got a hose end that’s 7/16-20 female JIC, and the other side needs to be 9/16-18 male JIC. Is this the straight adapter for that?
Answer by: Customer Support on Mar 24, 2026, 8:42 AM
For connecting those two JIC sizes in a straight run, this adapter matches 7/16-20 female JIC 37 degree flare on one end and 9/16-18 male JIC 37 degree flare on the other.
Question by: Travis P on Oct 25, 2025, 9:12 PM
got a #4 female JIC line and need to step it up to a #6 male JIC fitting, this the right adapter for that?
Answer by: Customer Support on Oct 27, 2025, 1:14 PM
That's what this one's for. The female end is 7/16-20 thread, which is your standard #4 JIC, and the male end steps up to 9/16-18, which is your #6 JIC. Both ends are 37-degree flare, straight configuration, so you're getting a direct metal-to-metal seal without any thread sealant needed. Tube OD on this comes in at 0.38 inches. Pretty straightforward swap if your line sizes match up.
Question by: Todd R on Mar 31, 2025, 9:51 PM
Will this fitting work with standard JIC flares?
Answer by: Customer Support on Apr 2, 2025, 6:19 AM
Designed to work with standard JIC connections, this steel adapter uses both 7/16-20 female and 9/16-18 male 37 degree flare threads.

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