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Steel Adapter, 1/4-18 Female NPT Swivel To 3/8-18 Male NPT, Straight

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Description & Features

This steel adapter is manufactured by Eaton Aeroquip and features a 1/4-18 female NPT swivel to 3/8-18 male NPT straight connection. It is suitable for use in various applications, including marine and military environments, chemical processing, pulp and paper industries, food and beverage processing, and off-shore drilling.

With an A dimension of 1.25, this adapter is a reliable component for fluid conveyance. Consult the Eaton fluid compatibility document for appropriate usage.

SKU: 2045-4-6S

Supplier Part Number (MPN): 2045-4-6S

Alternate Part Numbers: C1AY67, MI-00320963, MINO-00015F66018

Specifications

A
1.25
Alternate Part Numbers
Alternate Part Number C1AY67, Alternate Part Number MI-00320963, Alternate Part Number MINO-00015F66018
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
13553
End Gender 2
13556
End Size 1
0.25
End Size 2
0.38
End Type 1
NPSM
End Type 2
NPTF
Hex Size 2
0.69
Minimum Working Temperature
-40
Supplier Part Number
2045-4-6S
Thread 1
1/4-18
Thread 2
3/8-18
Thread Sealant
No
Product Weight
0.95 lbs

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Product Questions & Answers (3)

Question by: Larry A on Apr 26, 2025, 5:34 PM
got a hose with a 1/4-18 female npt swivel end. will this adapter step me up to a 3/8-18 male npt on the other side?
Answer by: Customer Support on Apr 28, 2025, 6:52 AM
You’ve got the right idea. This is a straight steel adapter that goes from a 1/4-18 female NPT swivel (NPSM internal pipe swivel) to a 3/8-18 male NPT (NPTF external pipe).
Question by: Hank C on Mar 24, 2026, 4:31 PM
got a 1/4 female NPT port on a valve body and need to step up to a 3/8 male NPT connection on the line side, this the right piece for that?
Answer by: Customer Support on Mar 26, 2026, 8:04 AM
That's what this adapter handles. The swivel end is 1/4-18 female NPT and the fixed end is 3/8-18 male NPT, so it bridges that size difference in a straight configuration. The NPSM internal swivel threading allows the female end to rotate during installation without twisting the connected line, which makes it a lot easier to get a clean, stress-free makeup on the fitting.
Question by: Hugh A on Nov 1, 2025, 8:33 AM
Is this adapter good for marine applications?
Answer by: Customer Support on Nov 2, 2025, 4:30 PM
Yes, this adapter is suitable for marine applications. Its also used in military, chemical processing, pulp and paper, and food and beverage industries.