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Steel Adapter, 1/4-18 Female NPT To 9/16-18 Female JIC 37 deg Flare Swivel, Straight

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Description & Features

Designed for precision, this steel adapter is integral for connecting 1/4-18 Female NPT to 9/16-18 Female JIC 37-degree flare fittings. Renowned for its robustness, it serves efficient and reliable fluid transfer applications.

Manufactured by Brennan Industries, Inc., it ensures adaptability and reliability. This model, catalog number C1DY72, features a tube O.D. of 0.38 inches.

Its construction offers a practical solution for industrial environments requiring dependable and durable connections.

MPN: 6506-04-06

Supplier Part Number: 6506-04-06

Specifications

Connection Size 1
3/8 in
Connection Size 2
1/4 in
Connection Type
Female JIC Swivel, FNPT
Connection Type 1
Female SAE 37 deg JIC Flare Swivel
Connection Type 2
Female SAE NPTF
Dimension Standards
SAE J476/J514
Dimensions
1.63 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
0.75 x 0.69 in
Material
Steel
Material Construction
AISI 12L14/C1045 Steel
Maximum Operating Pressure
5000 psi
Series
6506 Series
Thread Sealant
Without Thread Sealant
Thread Size
1/4-18 x 9/16-18
Tube OD
3/8 in
Tube Outside Diameter
0.38 in

Product Questions & Answers (5)

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Question by: Troy P on Jun 3, 2025, 8:46 PM
got a 1/4 female NPT port on a hydraulic block and need to tie into a 9/16-18 JIC female line, this straight adapter the right call for that?
Answer by: Customer Support on Jun 5, 2025, 6:42 AM
That's exactly the application this fitting is built for. One end threads into a 1/4-18 female NPT port, and the other connects to a 9/16-18 female JIC 37 degree flare swivel line. The straight configuration keeps everything in-line, so if your ports are aligned and you don't need an elbow or angle fitting, this one fits the bill. Steel construction holds up well in standard hydraulic hydraulic connections environments.
Question by: Daryl C on Oct 24, 2025, 7:10 PM
trying to hook a 1/4-18 female NPT port over to a 9/16-18 female JIC swivel, is that what this adapter does?
Answer by: Customer Support on Oct 26, 2025, 12:20 PM
Converts a 1/4-18 female NPT connection on one side to a 9/16-18 female JIC 37 degree flare swivel on the other, in a straight adapter body.
Question by: Norm R on Jul 4, 2025, 10:46 AM
fitting goes from female NPT on one end to female JIC flare on the other end, that right? trying to make sure i got the thread sizes straight before i order
Answer by: Customer Support on Jul 5, 2025, 4:17 PM
Correct on both counts. One end is 1/4-18 Female NPT and the other is 9/16-18 Female JIC 37-degree flare swivel. Both ends are female, so you'll need male threads on whatever you're connecting to on each side. The straight configuration means there's no angle change between the two ports.
Question by: Norm J on Jun 8, 2025, 10:29 AM
need to hook up a 1/4-18 female NPT port to a JIC line, is this the right adapter?
Answer by: Customer Support on Jun 10, 2025, 6:53 AM
For that kind of hookup, it matches a 1/4-18 female NPT on one side and a 9/16-18 female JIC 37 degree flare swivel on the other, in a straight body.
Question by: Melvin A on Sep 22, 2025, 6:48 AM
Will this adapter work to connect a 1/4 inch NPT female fitting to a 9/16 inch JIC female fitting?
Answer by: Customer Support on Sep 23, 2025, 5:32 PM
Yes, this steel adapter is designed to connect a 1/4-18 Female NPT to a 9/16-18 Female JIC 37-degree flare swivel fitting.

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