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Steel Adapter, 3/8-18 Female NPT To 9/16-18 Male JIC 37 deg Flare, Straight Bulkhead

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Description & Features

The Steel Adapter, 3/8-18 Female NPT to 9/16-18 Male JIC 37deg; Flare, Straight Bulkhead integrates seamlessly into industrial fluid transfer systems. This adapter, from Brennan Industries Inc, ensures reliable, leak-free connections in high-pressure applications.

Utilizing precise threading, the 3/8-18 Female NPT and 9/16-18 Male JIC 37deg; Flare ends furnish dependable performance. The steel construction offers robust durability, resisting wear and corrosion, which contributes to long-term reliability.

The straight bulkhead design facilitates easy installation and secure fitment. Ideal for hydraulic systems, the adapter supports efficient fluid flow while maintaining structural integrity under demanding conditions.

Supplier Part Number: 2705-06-06

Specifications

a Dimensions
2.19 in
Connection Size 1
3/8 in
Connection Size 2
3/8 in
Connection Type
FNPT, Male JIC
Connection Type 1
Male SAE 37 deg JIC Flare
Connection Type 2
Female NPTF
Dimension Standards
SAE J476, SAE J514
Dimensions
2.23 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
7/8 in
Material
Steel
Material Construction
AISI 12L14/C1045 Steel
Maximum Operating Pressure
6000 psi
Series
2705 Series
Thread Sealant
Without Thread Sealant
Thread Size
3/8-18, 9/16-18
Tube OD
3/8 in
Tube Outside Diameter
0.38 in

Product Questions & Answers (3)

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Question by: Bobby G on Jun 26, 2025, 6:29 PM
i got a hose end that’s 9/16-18 JIC, will this adapter mate up to that and still give me NPT on the other side?
Answer by: Customer Support on Jun 28, 2025, 11:24 AM
On the JIC side, you get a 9/16-18 male JIC 37 degree flare. The other end is a 3/8-18 female NPT, so it’s meant to bridge a 9/16-18 JIC connection over to a 3/8-18 NPT threaded connection.
Question by: Duane R on Nov 25, 2025, 11:23 AM
got a 3/8 female NPT port on a panel and need to run a JIC line off it, this the right adapter to bridge that gap?
Answer by: Customer Support on Nov 26, 2025, 5:11 PM
That's exactly what this fitting is built for. One end threads into a 3/8-18 female NPT port, and the other presents a 9/16-18 male JIC 37-degree flare for your JIC line connection. The bulkhead design also means it's meant to mount through a panel or wall, so if you're routing a line through sheet metal or a housing, it'll seat and lock in place securely rather than just floating in line.
Question by: Warren M on Mar 2, 2026, 4:21 PM
Will this here fitting work to connect a 3/8" female NPT to a 9/16" male JIC?
Answer by: Customer Support on Mar 4, 2026, 6:24 AM
This steel adapter is specifically designed to connect a 3/8-18 Female NPT to a 9/16-18 Male JIC 37 degree flare.

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