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Steel Adapter, 1/2-20 Female JIC 37 deg Flare To 9/16-18 Male JIC 37 deg Flare, Straight

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Description & Features

This steel adapter is engineered for seamless connectivity in industrial settings. Featuring a 1/2-20 female JIC 37deg; flare to a 9/16-18 male JIC 37deg; flare, it ensures a secure fit without the need for additional thread sealant. Designed by Brennan Industries Inc, this adapter is part of their robust catalog of 37deg; flare union steel adapters, model C1FA61.

With a precise tube O.D. of 0.38, the adapter guarantees compatibility with a range of hydraulic and pneumatic systems. The sturdy steel construction provides enhanced durability, making it suitable for demanding operational environments. This adapter's reliable connection points ensure leak-free performance, which is critical for maintaining fluid integrity.

**Supplier Part Number:** 2406-05-06

**MPN:** 2406-05-06

Specifications

a Dimensions
1.17 in
Connection Size 1
5/16 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
1.17 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 x 1/2-20
Tube OD
3/8 in
Tube Outside Diameter
0.38 in

Product Questions & Answers (3)

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Question by: Bonnie M on Dec 19, 2025, 7:44 AM
got a hose end that’s 1/2-20 female JIC, will this mate up and give me a 9/16-18 male JIC on the other side?
Answer by: Customer Support on Dec 21, 2025, 6:16 AM
For a straight JIC 37 degree flare connection, it converts from 1/2-20 female JIC on one end to 9/16-18 male JIC on the other. It’s a female to male JIC flare adapter, so it’s meant for exactly that kind of size step.
Question by: Ross C on Jan 26, 2026, 9:22 AM
fitting's got a 9/16-18 male end on it, will that thread straight into a standard #6 JIC port without any sealant or tape?
Answer by: Customer Support on Jan 27, 2026, 4:44 PM
JIC 37 degree flare connections seal on the flare itself, so no thread sealant or tape is needed on either end. The 9/16-18 male threads on this adapter are standard #6 JIC, and the 1/2-20 female end is standard #5 JIC. As long as the mating fittings are also JIC 37 degree flare, you'll get a metal-to-metal seal that holds without any added compounds.
Question by: Tony G on Jun 8, 2025, 1:23 PM
Will this here adapter work to connect a half-inch female to a 9/16 male?
Answer by: Customer Support on Jun 9, 2025, 5:59 PM
Yes, this steel adapter is specifically designed to connect a 1/2-20 female JIC 37 degree flare fitting to a 9/16-18 male JIC 37 degree flare fitting.

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