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Steel Adapter, 3/4-14 Male NPT To 1-11-1/2 Female NPT, Straight

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Description & Features

Manufactured by Eaton Aeroquip, this straight steel adapter connects a 3/4-14 Male NPT thread to a 1-11½ Female NPT thread, making it well suited for grease systems, instrumentation lines, and general hydraulic applications. The straight configuration keeps the connection compact and in-line, with an overall length of 2.18 inches.

The Steel Adapter, 3/4-14 Male NPT To 1-11-1/2 Female NPT, Straight belongs to the Eaton Aeroquip 2040 Series, which uses an NPTF external pipe thread form and a countersunk hex drive for installation access in tight spaces. This design is commonly used where a step-up in thread size is required within a hydraulic circuit.

SKU: 2040-12-16S

Supplier Part Number (MPN): 2040-12-16S

Alternate Part Numbers: C1AY27, MI-00327498, MINO-00015F68465

Specifications

A
2.18
Alternate Part Numbers
Alternate Part Number C1AY27, Alternate Part Number MI-00327498, Alternate Part Number MINO-00015F68465
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
0.75
End Size 2
1
End Type 1
NPTF
End Type 2
NPTF
Minimum Working Temperature
-40
Supplier Part Number
2040-12-16S
Thread 1
3/4-14
Thread 2
1-11-1/2
Thread Sealant
No
Product Weight
0.60 lbs

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Product Questions & Answers (2)

Question by: Ray B on Jun 17, 2025, 7:23 AM
Got a 3/4 male NPT port on a manifold block and need to step it up to a 1-inch female connection. This the right part for that job?
Answer by: Customer Support on Jun 19, 2025, 6:40 AM
That's what this adapter is built for. It takes a 3/4-14 male NPT thread on one end and accepts a 1-11-1/2 female NPT connection on the other, all in a straight configuration. It's part of the Eaton Aeroquip 2040 Series, so the thread dimensions and countersunk hex body are consistent with that lineup. For stepping up thread sizes between those two specific NPT sizes in a straight run, this is the correct fit.
Question by: Jean W on Feb 17, 2026, 12:32 PM
Is this the right fitting to go from a 3/4 inch male NPT to a 1 inch female NPT?
Answer by: Customer Support on Feb 19, 2026, 6:04 AM
That's exactly right. This adapter features a 3/4-14 male NPT thread on one end and a 1-11-1/2 female NPT thread on the other, making it a straight adapter for that conversion.