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

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Description & Features

Designed for straight bulkhead installations, this Eaton Aeroquip Steel Adapter, 1/4-18 Male NPT To 9/16-18 Male JIC 37 Deg Flare, Straight Bulkhead provides a reliable threaded connection between NPT and JIC 37° flare fittings in hydraulic, instrumentation, and chemical processing systems. Zinc-plated steel construction provides corrosion resistance suited to demanding industrial environments.

Part of the Eaton Aeroquip 2240 Series, this adapter features an overall length of 2.12 inches and is catalogued under Eaton part number C1BD20. The combination of Male NPT and Male JIC 37° flare ends makes it well suited for panel or bulkhead mounting applications where a secure, leak-resistant connection between dissimilar thread standards is required.

SKU: 2240-4-6S

Supplier Part Number (MPN): 2240-4-6S

Alternate Part Numbers: C1BD20, MI-00298913, MINO-00015F47344

Specifications

A
2.12
Alternate Part Numbers
Alternate Part Number C1BD20, Alternate Part Number MI-00298913, Alternate Part Number MINO-00015F47344
Application
Other - Hydraulic, instrumentation, and chemical processing systems
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
Hex Size 2
0.81
Minimum Working Temperature
-65
Supplier Part Number
2240-4-6S
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
0.14 lbs

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Product Questions & Answers (2)

Question by: Jerry H on Sep 15, 2025, 8:40 PM
Will this adapter work for hydraulic systems in chemical processing?
Answer by: Customer Support on Sep 17, 2025, 4:08 PM
This adapter is suitable for hydraulic, instrumentation, and chemical processing systems, according to the listed applications.
Question by: Tommy M on Apr 22, 2025, 2:19 PM
Got a bulkhead fitting that needs to go from NPT pipe thread on one side to a JIC flare connection on the other, this the right part for that?
Answer by: Customer Support on Apr 23, 2025, 8:36 PM
That's what this adapter is built for. One end is 1/4-18 Male NPT and the other is 9/16-18 Male JIC 37 degree flare, so it bridges those two thread types in a straight, bulkhead-style configuration. It comes from Eaton Aeroquip's 2240 Series and carries a zinc plated finish. If your application falls under hydraulic, instrumentation, or chemical processing systems, this fits right in with what it's rated for.