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Brass Adapter, 1/4-18 Male NPT To 0.31 Inch Female 42 deg Inverted Flare, 90 deg Elbow

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Description & Features

The Brass Adapter 1/4-18 Male NPT To 0.31 Inch Female 42 deg Inverted Flare 90 deg Elbow is designed for efficient and reliable connections in hydraulic brake power steering fuel lines transmission cooler lines and LP and natural gas systems. The male NPT connection ensures robust threading while the inverted flare provides a secure seal.

Engineered to function in temperatures as low as -65 degrees this adapter is a dependable component for cold environments. The 0.8700 drop dimension allows for seamless integration into existing setups minimizing installation time and improving overall system compatibility.

This durable brass adapter offered under the Danfoss Power Solutions brand is a high-quality part for a variety of industrial applications. It features a 1/4-18 NPT male end and a 0.31-inch female 42-degree inverted flare connection making it suitable for precise and secure connections.

MPN: 402X5X4

Supplier Part Number: 402X5X4

Specifications

Alternate Part Numbers
Alternate Part Number C1HD85, Alternate Part Number FMC102-0080, Alternate Part Number MI-00333450, Alternate Part Number MINO-00015X06301, Alternate Part Number MINO-00925F73172
Application
Hydraulic brake, power
steering, fuel lines and
transmission cooler lines,
LP and natural gas (special
order).
instrumentation and hydraulic
systems.
Drop Dimension
0.87
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
0.50
End Type 1
NPTF
End Type 2
Inverted
L
0.45
Minimum Working Temperature
-65
Supplier Part Number
402X5X4
Thread 1
1/4-18
Thread Sealant
No
Tube O.D.
0.31
Tube O.D.
0.31
Product Weight
0.08 lbs

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Product Questions & Answers (2)

Question by: Billy T on Sep 26, 2025, 6:33 AM
What all can this brass elbow adapter be used for? Got a few different lines on a piece of equipment and trying to figure out if one part covers my needs.
Answer by: Customer Support on Sep 28, 2025, 8:45 AM
Quite a few applications, actually. It's rated for hydraulic brake lines, power steering lines, fuel lines, transmission cooler lines, and LP and natural gas systems. If you're dealing with more than one of those on the same machine, there's a solid chance this adapter covers more than one of your connections. Just make sure the thread and flare sizes line up on your end before ordering.
Question by: Lyle W on Feb 27, 2026, 3:35 PM
trying to hook a 1/4-18 npt port to an inverted flare line, is that what this elbow is for?
Answer by: Customer Support on Mar 1, 2026, 6:50 AM
For tying those two styles together, it’s a 90 degree brass adapter with a 1/4-18 male NPT on one end and a 0.31 inch female 42 degree inverted flare on the other, so you can transition from an NPT port to an inverted flare connection.