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Steel Adapter, 1/8-27 Male NPT To 1/4-18 Female NPT, Straight

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Description & Features

Enhance your hydraulic systems with the reliable Eaton Aeroquip Steel Adapter, expertly designed for durability and precision. This straight adapter features a 1/8-27 male NPT to 1/4-18 female NPT connection, making it an ideal choice for grease, instrumentation, and various hydraulic applications. Crafted from high-quality steel, it ensures durability and compatibility with a wide range of fluids, as detailed in the accompanying fluid compatibility document. The adapter's robust design meets the demands of industrial environments, providing a secure and leak-free connection.

With its Eaton Aeroquip branding, this adapter guarantees quality and performance, backed by a trusted name in the industry. The adapter's specification ensures seamless integration into existing systems, supporting operational efficiency and system integrity. Whether in manufacturing or maintenance applications, this adapter proves to be a vital component in ensuring consistent hydraulic performance.

SKU: 2040-2-4S

Supplier Part Number (MPN): 2040-2-4S

Alternate Part Numbers: C1AY31, FMC102-1218, MI-00327454, MINO-00015F68450

Specifications

A
1.21
Alternate Part Numbers
Alternate Part Number C1AY31, Alternate Part Number FMC102-1218, Alternate Part Number MI-00327454, Alternate Part Number MINO-00015F68450
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
0.13
End Size 2
0.25
End Type 1
NPTF
End Type 2
NPTF
Minimum Working Temperature
-40
Supplier Part Number
2040-2-4S
Thread 1
1/8-27
Thread 2
1/4-18
Thread Sealant
No
Product Weight
0.08 lbs

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Product Questions & Answers (3)

Question by: Jimmy S on Oct 17, 2025, 8:40 PM
got a 1/8-27 npt male port and need to step it up, is this the right adapter?
Answer by: Customer Support on Oct 19, 2025, 7:20 PM
For a straight pipe-to-pipe step-up, it matches that setup. One end is 1/8-27 male NPTF and the other end is 1/4-18 female NPTF.
Question by: Ralph G on Aug 3, 2025, 3:22 PM
what all can this adapter be used for, just hydraulics or other stuff too?
Answer by: Customer Support on Aug 5, 2025, 6:28 AM
Grease systems, instrumentation lines, and most hydraulic setups all fall within what this fitting is rated for. It steps up from a 1/8-27 male NPT thread to a 1/4-18 female NPT, so anywhere you need to expand thread size in one of those system types, it fits right in. Pretty versatile little piece for how simple it looks.
Question by: Merle F on Jan 1, 2026, 9:07 PM
Hey, will this here adapter fit if I need to go from a smaller male pipe thread to a bigger female one?
Answer by: Customer Support on Jan 3, 2026, 7:12 PM
Application-wise, this adapter is designed for use in grease, instrumentation, and most hydraulic systems, so it should suit your needs for adapting between different NPT thread sizes.