Steel Adapter, 1/8-27 Male NPT To 9/16-18 Male JIC 37 deg Flare, Straight

Description & Features

Designed for diverse industrial applications, the Steel Adapter offers seamless connection between 1/8-27 Male NPT and 9/16-18 Male JIC 37-degree flare fittings. Crafted under the trusted Eaton Aeroquip brand, this straight adapter is ideal for use in challenging environments like marine, military, chemical processing, pulp and paper, food and beverage processing, and off-shore drilling. Its robust construction ensures reliability and compatibility with a range of fluids, as evidenced by detailed compatibility documentation.

The adapter's precision-engineered design facilitates efficient hydraulic connections, enhancing system performance. The Eaton 2021 Series, known for its durability and adaptability, provides a dependable solution for demanding settings where secure and leak-free connections are critical. Its straightforward configuration makes it a practical choice for maintaining and optimizing industrial fluid systems.

SKU: 2021-2-6S

Supplier Part Number (MPN): 2021-2-6S

Alternate Part Numbers: C1AU90, MI-00310122, MINO-00015F60063

Specifications

Connection Size 1
3/8 in
Connection Size 2
1/8 in
Connection Type
Male JIC, MNPT
Connection Type 1
Male SAE 37 deg JIC Flare
Connection Type 2
Male NPTF
Dimension Standards
SAE 070102/J514
Dimensions
1.24 in L
Finish
Dura-Kote™
Fitting Type
Adapter
Hex Size
5/8 in
Material
Steel
Material Construction
Carbon Steel
Operating Temperature
-40
Series
2021 Series
Thread Size
9/16-18 x 1/8-27
Tube OD
3/8 in

Product Questions & Answers (1)

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Question by: Diane T on Nov 4, 2025, 8:33 AM
Will this adapter work to connect a pressure gauge with a 1/8" NPT fitting to a hydraulic system using 9/16" JIC?
Answer by: Customer Support on Nov 5, 2025, 12:55 PM
This straight adapter is designed to connect a 1/8-27 male NPT (National Pipe Taper) fitting to a 9/16-18 male JIC (Joint Industry Council) 37-degree flare fitting.

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