SAME DAY SHIPPING
— Order by 2pm EST.
Toggle Nav
Cart
Search
main product photo

Steel Adapter, 3/8-24 Male SAE O-Ring Boss (Straight Thread O-Ring) To 7/16-20 Male JIC 37 deg Flare, Straight

Ask A Question

Description & Features

Expertly crafted by Brennan Industries Inc this steel adapter ensures reliable connections for industrial fluid transfer systems. Engineered with a 3/8-24 male SAE O-Ring Boss and a 7/16-20 male JIC 37 flare it guarantees a secure leak-free fit.

Featuring durable construction this adapter is designed to withstand high-pressure applications. Its precise threading and O-ring boss interface enhance seal integrity reducing the risk of leaks. Ideal for achieving seamless integration in complex hydraulic setups.

Whether it's in heavy machinery or industrial operations this steel adapters robust build and accurate dimensions ensure optimal performance. The adapter's straight configuration simplifies the connection process making it a practical choice for various hydraulic systems.

Supplier Part Number: 6400-04-03-O

Specifications

Connection Size 1
3/16 in
Connection Size 2
1/4 in
Connection Type
Male JIC, Male SAE ORB
Connection Type 1
Male SAE ORB
Connection Type 2
Male SAE 37 deg JIC Flare
Dimension Standards
SAE J1926/J514
Dimensions
1.17 in L
Finish
Trivalent Zinc-Plated
Fitting Type
Adapter
Hex Size
0.563 in
Material
Steel
Material Construction
AISI 12L14/C1045 Steel
Operating Temperature
-40 to 250 deg F
Series
6400-O Series
Thread Sealant
Without Thread Sealant
Thread Size
7/16-20 x 3/8-24
Tube OD
1/4 in
Tube Outside Diameter
1/4 in

Product Questions & Answers (2)

Sign In Hover me Please sign in to submit a question
Question by: Marvin W on Feb 20, 2026, 10:00 AM
Wondering if this adapter is good for high pressure in hydraulic systems?
Answer by: Customer Support on Feb 22, 2026, 6:24 AM
This steel adapter's durable construction is designed to handle high-pressure applications, ensuring a reliable and secure connection in demanding hydraulic setups.
Question by: Judy C on Sep 19, 2025, 1:37 PM
got a line running 1/4 inch tube off an ORB port and need to step up to a JIC fitting on the other end, this the right adapter for that?
Answer by: Customer Support on Sep 20, 2025, 8:14 PM
For a 1/4 inch tube application, this adapter lines up correctly. The JIC side is sized for 7/16-20 thread, which corresponds to a 1/4 inch tube OD on a 37 degree flare fitting. The other end is a 3/8-24 male SAE O-Ring Boss, so it threads directly into a female ORB port. The straight configuration keeps the connection simple with no angle to work around, which is handy when space isn't a concern and you just need a clean inline transition between those two fitting types.

Tell us what you need and we'll get back to you.

Fields marked * are required.