Brass Adapter, 0.25 Inch Male 42 deg Inverted Flare Plug

Description & Features

Designed for specialized applications this Brass Adapter with a male 0.25-inch tube O.D. offers robust performance in industrial environments. Manufactured by Danfoss Power Solutions (Aeroquip Inc-Alternate) the adapter features a 42-degree inverted flare design for secure and efficient connections.

Its compatibility with 0.4375-inch UNF threads ensures reliable integration with existing systems providing a seamless fit without requiring additional sealants. The durable brass construction endures demanding conditions delivering long-term functionality and dependability.

Ideal for segments where 42 inverted flare unions and accessories are employed it serves a crucial role in maintaining system integrity. This component's classification under ECCN EAR99 signifies it meets regulatory standards for export compliance.

Supplier Part Number: 131X4

Specifications

Connection Size 1
1/4 in
Connection Type
Male Inverted Flared
Connection Type 1
Male Inverted Flare
Dimension Standards
SAE 040109
Dimensions
0.54 in L x 0.437 in W x 0.437 in H
Finish
Dura-Kote™
Fitting Type
Plug
Hex Size
7/16 in
Material
Steel
Material Construction
Carbon Steel
Series
131X Series
Thread Sealant
Without Thread Sealant
Thread Size
7/16-24
Tube OD
1/4 in

Product Questions & Answers (2)

Sign In Hover me Please sign in to submit a question
Question by: Merle B on Jan 1, 2026, 2:40 PM
Will this plug hold up if I'm usin' it in a hydraulic system that gets pretty hot?
Answer by: Customer Support on Jan 2, 2026, 6:25 PM
Designed for demanding conditions, the brass construction should offer good durability in hydraulic systems, and help ensure long-term functionality and dependability.
Question by: Eddie P on Sep 27, 2025, 6:00 AM
trying to cap off a 1/4 inch tube line, is this the right plug for that?
Answer by: Customer Support on Sep 28, 2025, 11:56 AM
For capping a 0.25 inch tube O.D. connection that uses a 42 degree inverted flare seat, this plug is the right style. It is a male inverted flare plug with 0.4375 inch UNF threads, and it seals on the flare so you do not need extra sealants for the connection.

Tell us what you need and we'll get back to you.

Fields marked * are required.