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Steel Adapter, 1/4-18 Female NPT To 3/4-16 Male JIC 37 deg Flare, Straight

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Description & Features

Designed for versatility and reliability, the Eaton Aeroquip Steel Adapter seamlessly connects 1/4-18 Female NPT to 3/4-16 Male JIC 37-degree flare fittings. Constructed from durable steel, this straight adapter ensures optimal performance in demanding environments such as marine, military, and chemical processing applications. The precision-engineered design facilitates efficient fluid transfer, making it ideal for use in the pulp and paper, food and beverage, and off-shore drilling industries.

With its robust construction, the adapter provides a dependable solution for maintaining hydraulic system integrity. This component is a part of the trusted Eaton Aeroquip brand, known for its high-quality hydraulic solutions. Its compatibility with a broad range of fluids is detailed in the available fluid compatibility documentation, ensuring it meets diverse operational needs.

SKU: 2022-4-8S

Supplier Part Number (MPN): 2022-4-8S

Alternate Part Numbers: C1AV57, MI-00312056, MINO-00015F61355

Specifications

Connection Size 1
1/2 in
Connection Size 2
1/4 in
Connection Type
FNPT, Male JIC
Connection Type 1
Male SAE 37 deg JIC Flare
Connection Type 2
Female NPTF
Dimension Standards
SAE 070103/J514
Dimensions
1.55 in L
Finish
Dura-Kote™
Fitting Type
Adapter
Hex Size
0.87 in
Material
Steel
Material Construction
Carbon Steel
Operating Temperature
-40 to 250 deg F
Series
2022 Series
Thread Size
3/4-16, 1/4-18
Tube OD
1/2 in

Product Questions & Answers (3)

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Question by: Patty B on May 29, 2025, 11:58 AM
got a hose end that’s 3/4-16 JIC, and the port on my manifold is 1/4-18 pipe. is this the straight adapter for that?
Answer by: Customer Support on May 31, 2025, 6:43 AM
For connecting those two thread types, it’s a straight steel adapter with a 1/4-18 female NPTF on one end and a 3/4-16 male SAE 37 degree flare (JIC) on the other, so it matches the sizes and styles you called out.
Question by: Travis P on Jan 14, 2026, 12:25 PM
what industries is this adapter actually used in? got a few different applications i'm trying to cover and want to make sure it ain't just a one-trick pony
Answer by: Customer Support on Jan 15, 2026, 3:59 PM
Marine and military setups, chemical processing, pulp and paper use, food and beverage processing, and offshore drilling are all listed applications for this adapter. That is a fairly broad range, so if your work falls into any of those categories you are in good shape. The 1/4-18 female NPT to 3/4-16 male JIC 37 degree flare configuration handles the thread transition between those two common fitting standards, which is why it shows up across so many different industries.
Question by: Jimmy D on Jul 17, 2025, 7:57 AM
got a valve body with a 1/4-18 female pipe port and i need to come out to a 3/4-16 jic hose end. is this the right adapter?
Answer by: Customer Support on Jul 18, 2025, 9:46 AM
For that hookup, yes. It’s a straight adapter with 1/4-18 female NPTF (internal pipe) on one side and 3/4-16 male JIC 37 degree flare on the other, so it’s meant to transition from a pipe-thread port to a JIC flare connection.

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