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Steel Adapter, 1/2-14 Male NPT To 3/4-14 Female NPT, Straight

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Description & Features

Part of the Eaton Aeroquip 2040 Series, this Steel Adapter, 1/2-14 Male NPT To 3/4-14 Female NPT, Straight provides a reliable threaded connection between two different NPT pipe sizes in a compact, straight-body configuration. The countersunk hex drive design allows for secure installation in confined spaces where standard wrench access may be limited.

Suitable for grease lines, instrumentation circuits, and most hydraulic systems, this adapter is a practical solution for size transitions within a single fluid line. The NPTF thread form on both ends provides a pressure-tight mechanical seal without relying solely on sealant. With an overall length (A dimension) of 1.93 inches, the fitting adds minimal footprint to an assembly. The Eaton Aeroquip catalog number for this part is C1AY37.

SKU: 2040-8-12S

Supplier Part Number (MPN): 2040-8-12S

Alternate Part Numbers: C1AY37, MI-00327482, MINO-00015F68460

Specifications

A
1.93
Alternate Part Numbers
Alternate Part Number C1AY37, Alternate Part Number MI-00327482, Alternate Part Number MINO-00015F68460
Application
Other - Grease, instrumentation, and most hydraulic systems
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
End Gender 1
13554
End Gender 2
13555
End Size 1
0.50
End Size 2
0.75
End Type 1
NPTF
End Type 2
NPTF
Minimum Working Temperature
-40
Supplier Part Number
2040-8-12S
Thread 1
1/2-14
Thread 2
3/4-14
Thread Sealant
No
Product Weight
0.17 lbs

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Product Questions & Answers (3)

Question by: Janet W on May 15, 2025, 11:24 AM
does this adapter go from a smaller male pipe thread up to a bigger female end, or is it the other way around?
Answer by: Customer Support on May 17, 2025, 6:50 AM
The male end is 1/2-14 NPT and the female end is 3/4-14 NPT, so yes, you're stepping up in size. The smaller threaded male side connects into your existing port, and the larger female opening accepts the bigger fitting or line coming in. Straight configuration, no angle to it.
Question by: Johnny M on Jul 20, 2025, 11:39 AM
got a line with 1/2-14 male NPT on it, i need to step up to 3/4-14 female NPT. is that what this adapter does?
Answer by: Customer Support on Jul 21, 2025, 8:52 PM
Converts between those two pipe thread sizes in a straight adapter: 1/2-14 male NPT on one end and 3/4-14 female NPT on the other.
Question by: Connie B on Jan 8, 2026, 9:37 AM
Hey, will this here adapter work to go from a 1/2 inch male pipe thread to a 3/4 inch female pipe thread?
Answer by: Customer Support on Jan 9, 2026, 4:15 PM
Yes, sir, that's exactly what this Eaton Aeroquip adapter is made for. It's a straight adapter that goes from 1/2-14 Male NPT to 3/4-14 Female NPT.