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Steel Adapter, 3/4-16 Male JIC 37 deg Flare To 7/16-20 Male JIC 37 deg Flare, Straight

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Description & Features

Part of the Eaton Aeroquip 2027 Series, this Steel Adapter, 3/4-16 Male JIC 37 deg Flare To 7/16-20 Male JIC 37 deg Flare, Straight connects two male SAE 37° flare fittings of different thread sizes in a straight configuration, making it well suited for hydraulic, instrumentation, and chemical processing systems where a size transition between JIC lines is required.

Constructed from steel and carrying an overall length (A) of 1.51 inches, this union-style adapter is designed for reliable inline connections without changing flow direction. The dual SAE 37° flare seats on both ends provide leak-resistant sealing consistent with JIC fitting standards. With catalog number C1AW78, this fitting is cross-referenced across multiple Eaton Aeroquip product lines.

SKU: 2027-8-4S

Supplier Part Number (MPN): 2027-8-4S

Alternate Part Numbers: C1AW78, MI-00311669, MINO-00015F61164

Specifications

Connection Size 1
1/2 in
Connection Size 2
1/4 in
Connection Type
Male JIC
Connection Type 1
Male SAE 37 deg JIC Flare
Connection Type 2
Male SAE 37 deg JIC Flare
Dimension Standards
SAE 070101/J514
Dimensions
1.51 in L
Finish
Dura-Kote™
Fitting Type
Union
Hex Size
0.81 in
Material
Steel
Material Construction
Carbon Steel
Operating Temperature
-65 to 400 deg F
Series
2027 Series
Thread Size
3/4-16 x 7/16-20
Tube OD
1/4 in

Product Questions & Answers (3)

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Question by: Dale C on Jan 3, 2026, 7:51 PM
Will this adapter work for connecting two JIC flared fittings together?
Answer by: Customer Support on Jan 5, 2026, 12:22 PM
Yes, this adapter is designed to connect two SAE 37-degree flared fittings. It's a straight union adapter, so both fittings will be in line with each other.
Question by: Warren M on Dec 22, 2025, 6:45 AM
got a hose end with 3/4-16 jic, and the other side is 7/16-20 jic. is this the straight union that’ll hook those two together
Answer by: Customer Support on Dec 23, 2025, 7:08 AM
For tying two JIC 37 degree flare connections together, this adapter is a straight union with a 3/4-16 male JIC 37 degree flare on one end and a 7/16-20 male JIC 37 degree flare on the other.
Question by: Lance M on Jun 13, 2025, 9:02 PM
Got a fitting on my hydraulic line that's 3/4-16 JIC and I need to step it down to a 7/16-20 JIC connection. This the right part for that?
Answer by: Customer Support on Jun 15, 2025, 6:46 AM
That's what this adapter is built for. One end is 3/4-16 male JIC 37 degree flare, the other is 7/16-20 male JIC 37 degree flare, both using the same SAE 37 degree flare seating angle. It's a straight configuration, so there's no angle or offset involved. Both sides thread in male, so you'd need female JIC ports or fittings on whatever you're connecting to on each end.

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