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Brass Adapter, 1/4-18 Male NPT To 9/16-18 Male JIC 37 deg Flare, Straight

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Description & Features

The DANFOSS Power Solutions brass adapter is engineered for reliable performance in marine, military, chemical processing, and food and beverage industries. Constructed with precision, it connects a 1/4-18 Male NPT fitting to a 9/16-18 Male JIC 37-degree flare, providing a secure and leak-free connection.

With an end size of 0.25 inches NPTF and 0.5625 inches SAE 37, this brass adapter is suitable for various heavy-duty applications. Designed to operate efficiently even in harsh environments, it handles temperatures as low as -40 degrees Celsius.

Manufactured under strict quality standards, this Eaton ADPT 1/4 MP 6 MJIC ensures durability and dependable performance across different settings. The absence of thread sealant allows for straightforward application, seamlessly integrating into existing systems.

Suitable for off-shore drilling and pulp and paper industries, this adapter guarantees robustness and reliability. Its tube ID of 0.28 inches and tube OD of 0.38 inches offer compatibility with numerous industrial systems.

MPN: C1AV15

Supplier Part Number: 2021-4-6B

Specifications

A
1.43
Alternate Part Numbers
Alternate Part Number C1AV15, Alternate Part Number MI-00310587, Alternate Part Number MINO-00015F60162
Application
Marine/Military, Chemical Processing, Pulp and Paper Industries, Food and Beverage Processing, Off-Shore Drilling
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
End Gender 1
13554
End Gender 2
13556
End Size 1
0.25
End Size 2
0.56
End Type 1
NPTF
End Type 2
SAE 37
Minimum Working Temperature
-40
Supplier Part Number
2021-4-6B
Thread 1
1/4-18
Thread 2
9/16-18
Thread Sealant
No
Tube I.D. 1
0.28
Tube I.D. 2
0.28
Tube O.D.
0.38
Tube O.D.
0.38
Product Weight
0.07 lbs

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Product Questions & Answers (3)

Question by: Norm E on Jul 18, 2025, 7:46 AM
got a hose end that’s 9/16-18 JIC, will this adapter screw right into it and then go into a 1/4-18 pipe port?
Answer by: Customer Support on Jul 20, 2025, 6:05 AM
You’re looking at a straight brass adapter with a 9/16-18 male JIC 37 degree flare on one end and a 1/4-18 male NPTF pipe thread on the other, so it matches those two thread callouts end to end.
Question by: Pete K on May 24, 2025, 2:00 PM
got a hose end that’s 9/16-18 JIC 37 flare, and the port i need to hit is 1/4-18 NPT. is this the right adapter?
Answer by: Customer Support on May 25, 2025, 6:00 PM
Function-wise, it bridges exactly those two connections: one side is 1/4-18 male NPT (0.25 in NPTF) and the other side is 9/16-18 male JIC with a 37 degree flare (0.5625 in SAE 37). It’s a straight brass adapter meant to make that NPT to JIC flare transition.
Question by: Norm M on Nov 18, 2025, 5:29 PM
Will this adapter hold up if I'm using it in a saltwater environment on my boat?
Answer by: Customer Support on Nov 20, 2025, 7:57 AM
Designed to perform reliably in marine environments, this brass adapter from Eaton is also made for chemical processing applications, so saltwater shouldn't be an issue.