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Steel Adapter, 3/8-18 Female NPT To 3/4-16 Male JIC 37 deg Flare, Straight Bulkhead

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Description & Features

Designed for demanding applications, the Eaton Aeroquip Steel Adapter is a versatile solution for connecting hydraulic systems in marine, military, and industrial settings. This adapter features a 3/8-18 female NPTF and a 3/4-16 male JIC 37-degree flare, ensuring secure and reliable connections. Manufactured from high-quality steel, it offers durability and resistance to harsh environments, making it ideal for chemical processing, pulp and paper industries, food and beverage processing, and off-shore drilling.

The straight bulkhead design of the Steel Adapter facilitates easy integration into existing systems, while its compatibility with various fluids is supported by comprehensive documentation. With a minimum working temperature of -65°F, it performs reliably in extreme conditions. The Eaton Aeroquip product model offers precise engineering and robust construction, meeting the high standards expected in industrial applications.

SKU: 2239-6-8S

Supplier Part Number (MPN): 2239-6-8S

Alternate Part Numbers: 621-0604, C1BD16, MI-00314973, MINO-00015F63235

Specifications

Brand
Aeroquip® by Danfoss
a Dimensions
2.48 in
Connection Size 1
3/8 in
Connection Size 2
1/2 in
Connection Type
FNPT, Male JIC
Connection Type 1
Male SAE 37 deg JIC Flare
Connection Type 2
Female NPTF
Dimension Standards
SAE 070603/J514
Dimensions
1/2 in L
Finish
Dura-Kote™
Fitting Type
Adapter
Material
Steel
Material Construction
Carbon Steel
Segment Code
C
Series
2239 Series
Thread Size
3/4-16 x 3/8-18

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Product Questions & Answers (2)

Question by: Harold H on Oct 10, 2025, 11:08 AM
got a bulkhead port and need to go from 3/8 pipe female over to a JIC flare, is this the right adapter?
Answer by: Customer Support on Oct 12, 2025, 9:04 AM
For a straight bulkhead setup, this adapter is a 3/8-18 female NPTF on one side and a 3/4-16 male JIC 37 degree flare on the other, so it matches that pipe to JIC flare changeover.
Question by: Troy M on Jan 6, 2026, 6:46 PM
Will this bulkhead fitting hold up to typical hydraulic pressures in an off-road vehicle application?
Answer by: Customer Support on Jan 8, 2026, 7:23 AM
Designed for demanding environments, this Eaton Aeroquip adapter is frequently used in marine, military, and off-shore drilling applications, suggesting it can handle substantial pressure.

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