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Steel Adapter, 3/4-14 Male NPT To 7/8-14 Male JIC 37 deg Flare, Straight

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Description & Features

Designed for connecting 3/4-14 NPT pipe threads to 7/8-14 JIC 37° flare fittings, this straight steel adapter is part of the Danfoss Power Solutions (Aeroquip) 2021 Series and carries catalog number C1AU74. The male-to-male configuration uses NPTF on one end and SAE 37° flare on the other, making it a reliable transition fitting for mixed-thread hydraulic circuits. With a tube O.D. of 0.63 inches and a hex size of 1.22 inches, the adapter is straightforward to install with standard tooling.

The Steel Adapter, 3/4-14 Male NPT To 7/8-14 Male JIC 37 Deg Flare, Straight is rated for a minimum working temperature of -40°F and is suited for demanding environments including marine and military equipment, chemical processing, pulp and paper machinery, food and beverage processing, and offshore drilling applications. No thread sealant is required, simplifying assembly in the field.

SKU: 2021-12-10S

Supplier Part Number (MPN): 2021-12-10S

Alternate Part Numbers: C1AU74, MI-00310250, MINO-00015F60075

Specifications

A
1.95
Alternate Part Numbers
Alternate Part Number C1AU74, Alternate Part Number MI-00310250, Alternate Part Number MINO-00015F60075
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
0.75
End Size 2
0.88
End Type 1
NPTF
End Type 2
SAE 37
Hex Size 2
1.22
Minimum Working Temperature
-40
Supplier Part Number
2021-12-10S
Thread 1
3/4-14
Thread 2
7/8-14
Thread Sealant
No
Tube O.D.
0.63
Tube O.D.
0.63
Product Weight
0.23 lbs

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Product Questions & Answers (3)

Question by: Brent M on Sep 23, 2025, 10:29 AM
trying to hook a 3/4-14 pipe port to a JIC line, is this the straight adapter for that?
Answer by: Customer Support on Sep 24, 2025, 11:57 AM
For joining those two thread styles, it matches up a 3/4-14 male NPTF end on one side with a 7/8-14 male SAE 37 degree (JIC) flare end on the other, in a straight body.
Question by: Daryl H on Apr 13, 2025, 3:15 PM
Will this adapter hold up in a chemical processing plant?
Answer by: Customer Support on Apr 15, 2025, 11:20 AM
This Eaton Aeroquip adapter is suitable for chemical processing applications, along with marine/military, pulp and paper, food and beverage, and off-shore drilling uses.
Question by: Janet R on Jan 10, 2026, 2:51 PM
Got a hydraulic line running 3/4-14 NPT on one end and need to tie into a 7/8-14 JIC fitting on the other. This adapter gonna work for that straight shot connection?
Answer by: Customer Support on Jan 12, 2026, 9:12 AM
That's exactly what this piece is built for. The male NPT side is 3/4-14 thread and the male JIC side is 7/8-14 with a 37 degree flare, so it bridges those two thread types in a straight configuration without any angled offset. Both ends are male, so you'll need female-threaded ports or couplings on each side of whatever you're connecting it to. It's part of the Eaton Aeroquip 2021 Series, which covers pipe-to-flare adapter applications like this one.