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Brass Adapter, 0.31 Inch Male 42 deg Inverted Flare Plug

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Description & Features

The Danfoss / Eaton Inverted Flare Plug is expertly engineered to meet the high standards of industrial applications.

Manufactured from durable brass this adapter ensures robust performance and reliability. The 0.31 inch male inverted flare plug design supports seamless connections in complex systems.

Designed with a 42 inverted flare this component is ideal for ensuring secure fittings without the need for additional thread sealants. The 0.5 inch UNF thread type further enhances its compatibility with a range of industrial fittings.

This product falls under ECCN EAR99 and adheres to UNSPSC 40183100 standards making it suitable for a variety of industrial environments.

Supplier Part Number: 131X5

MPN: C1HM69

Specifications

Connection Size 1
5/16 in
Connection Type
Male Inverted Flared
Connection Type 1
Male Inverted Flare
Dimension Standards
SAE 040109
Dimensions
0.59 in L x 0.555 in W x 0.555 in H
Finish
Dura-Kote™
Fitting Type
Plug
Hex Size
0.563 in
Material
Steel
Material Construction
Carbon Steel
Series
131X Series
Thread Sealant
Without Thread Sealant
Thread Size
1/2-20

Product Questions & Answers (2)

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Question by: Diane C on Aug 9, 2025, 2:47 PM
got a port i need to cap off, is this the right kind of plug for an inverted flare seat?
Answer by: Customer Support on Aug 10, 2025, 6:38 PM
For an inverted flare connection, it’s meant to seal on a 42 degree inverted flare seat with a 0.31 inch male inverted flare plug end. It also uses a 0.5 inch UNF thread, and it’s built to make a secure seal without needing added thread sealant.
Question by: Dale M on Nov 17, 2025, 7:35 AM
Does this plug need any thread sealant or tape to make a good seal, or does the flare angle take care of that?
Answer by: Customer Support on Nov 18, 2025, 8:41 PM
The 42 degree inverted flare design handles the sealing on its own. No thread sealant or tape is needed to get a secure connection. That flare geometry creates the metal-to-metal seal, so adding sealant would actually be unnecessary and could interfere with the fit.

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