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Brass Adapter, 1/4-18 Male NPT To 0.25 Inch Female 42 deg Inverted Flare, 90 deg Elbow

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Description & Features

Optimize your hydraulic and instrumentation systems with this Brass Adapter 1/4-18 Male NPT To 0.25 Inch Female 42 deg Inverted Flare 90 deg Elbow by Danfoss Power Solutions (Aeroquip Inc-Alternate). This durable adapter is essential for hydraulic brake power steering fuel lines transmission cooler lines LP and natural gas applications.

The adapter's male NPT end fits securely with 1/4-18 threading while the female 42-degree inverted flare end accommodates a 0.25-inch diameter tube. Engineered to withstand temperatures as low as -65 degrees Fahrenheit this adapter ensures reliable performance under harsh conditions.

With a drop dimension of 0.8400 inches it meets the rigorous standards required for instrumentation and hydraulic systems. It's versatile and adheres to the UNSPSC 40183100 classification. The precision threading and sealing ensure a leak-free connection making it vital for various hydraulic and fuel line systems.

MPN: 42 Inverted Flare To Pipe Adapters SKU: 402X4X4

Supplier Part Number: 402X4X4

Specifications

Brand
Aeroquip® by Danfoss
Connection Size 1
1/4 in
Connection Size 2
1/4 in
Connection Type
Female SAE Inverted Flared, MNPT
Connection Type 1
Male NPTF
Connection Type 2
Female SAE Inverted Flared
Dimension Standards
SAE 040202
Dimensions
1.09 in L x 0.56 in W x 0.58 in H
Drop Dimensions
0.84 in
Fitting Type
90 deg Elbow
For Use With
Aluminum, Brass, Copper and Steel Hydraulic Tubings
m Dimensions
0.28 in
Material
Brass
Material Construction
Brass
Operating Temperature
-65 to 250 deg F
Series
402X Series
Thread Sealant
Without Thread Sealant
Thread Size
7/16-24
Tube OD
1/4 in

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Product Questions & Answers (2)

Question by: Debbie B on Apr 7, 2025, 8:37 AM
Will this fitting hold up okay for hooking up my fuel line?
Answer by: Customer Support on Apr 8, 2025, 2:04 PM
This brass adapter is designed for fuel lines, along with hydraulic brakes, power steering, and transmission cooler lines. It can also be used in LP and natural gas applications, though those are considered special orders.
Question by: Chad H on Nov 24, 2025, 2:34 PM
trying to hook a 1/4 inch tube up to a 1/4-18 npt port, is this the right elbow for that?
Answer by: Customer Support on Nov 26, 2025, 6:17 AM
For that combo, it matches up as a 90 degree elbow with a 1/4-18 male NPT on one end and a 0.25 inch female 42 degree inverted flare on the other, which is meant to mate to 1/4 inch tube flare connections.

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