This Eaton Aeroquip brass adapter features a male NPTF end and a female hose/pipe/tube end, both with a 0.25 inch size. The Danfoss / Eaton Brass Adapter is suitable for instrumentation, hydraulic, and pneumatic systems.
It features Dura-Kote plating for superior corrosion resistance and design flexibility with hundreds of styles to choose from, offering higher operating pressures above SAE standards. It is designed to withstand a minimum working temperature of -65 degrees Fahrenheit.
SKU: 681X4X4
Supplier Part Number (MPN): 681X4X4
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Specifications
Alternate Part Numbers
Alternate Part NumberMINO-00015X07481
Application
Other - Instrumentation, hydraulic, and pneumatic 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
0.25
End Size 2
0.25
End Type 1
NPTF
End Type 2
Line/Hose/Tube
Features
Dura-Kote plating for superior corrosion resistance|Design flexibility with hundreds of styles to choose from|Higher operating pressures above SAE standards
Hex Size 2
0.50
ICC
Straight Adapters
Item Type
NPTF Male Male to Hose/Pipe/Tube Female
Language
English
Minimum Working Temperature
-65
Net Pack Quantity Units
EA
NMFC
60
Product Material
Brass
Product Width
0.56
Sub Brand
None
Supplier Part Number
681X4X4
Product Weight
0.07 lbs
Product Questions & Answers (2)
Question by: Lynn P on Oct 16, 2025, 6:58 PM
what's the smallest wrench size i'd need on the hose end of this fitting?
Answer by: Customer Support on Oct 17, 2025, 9:40 PM
The hex on the hose/tube end measures half an inch, so a standard half-inch wrench will seat right on it. The male NPTF side is a quarter-inch thread, which is pretty common on instrumentation and hydraulic lines, so most folks already have what they need in the toolbox before they even open the bag.
Question by: Larry M on Dec 17, 2025, 6:56 PM
Will this adapter hold up outside? We get some pretty harsh winters here.
Answer by: Customer Support on Dec 19, 2025, 8:30 AM
Dura-Kote plating gives this adapter superior corrosion resistance, so it should be suitable for outdoor use. Just be sure to consider the minimum working temperature of -65°F.