Reduced F-M coupling 3/8"x1/4" brass – DVGW – code: 0246C*B – Maestrini

Maestrini brass reduced F-M coupling

The reduced coupling F-M Maestrini is a fitting in brass designed to create a threaded connection between two components with different sizes, maintaining a simple and neat system layout. This version is configured with female thread (F) from , in the and male thread (M) from 1/4″, typical solution when adapting a line or accessory to a branch or a component with a smaller connection.

The product is identified by the Maestrini code 0246C*B and is indicated as DVGW in the name. It is a suitable choice for technical contexts where a compact and practical fitting is desired for thread reduction, with materials and finishes typical of brass fittings for plant engineering.

Features and construction details

This reduced coupling is designed to perform a precise function: reduce a thread going from a larger connection to a smaller one, with a configuration F-M that facilitates insertion into existing lines or assemblies where it is necessary to “interpose” an adapter.

Thread configuration

• Type: reduced sleeve F-M (female/male)
• Female side size: , in the
• Male side size: 1/4″

Material

• Material: brass (indicated as yellow brass in the existing description)

Product identification

• Brand / manufacturer: Maestrini
• Supplier product code: 0246C*B

The choice of brass is common in fittings for plants due to its widespread use in hydraulics and good machinability, useful for obtaining precise threads and correct fittings. During selection, it is important to verify that the thread sizes match those of the components to be connected and that the F-M configuration is consistent with the mounting direction required by the system.

Typical applications (nautical and plant engineering)

A reduced coupling like this is often used to adapt components with non-uniform connections, avoiding invasive modifications and maintaining a clean connection line. It is useful when installing or replacing accessories, valves, technical taps, or fitting elements that have different threads compared to the existing line.

• Adaptation of threaded lines: direct transition from 3/8″ to 1/4″.
• Maintenance and retrofit: useful when a replacement component has a different connection than the original.
• Compact assemblies: practical solution when space is limited and an essential threaded reducer is needed.
• Technical systems: use in hydraulic contexts where there are branches or accessories with mixed threads.

Operational advantages

An F-M reduced coupling is a simple component, but often decisive to complete an assembly neatly. This Maestrini model allows managing thread reduction with a single element, limiting the number of adapters and simplifying the bill of materials.

• Immediate reduction: connects two different sizes directly without “chain” solutions.
• Practical size: ideal when an essential and easy-to-integrate fitting is desired.
• Common material in plant engineering: brass, typical for threaded fittings in the hydraulic field.
• Clear coding: Maestrini reference 0246C*B useful for reorders and maintenance.

Usage and installation notes

For a correct assembly of a reduced threaded sleeve, it is good practice to work with clean components and threads in good condition. Before installation, check that the measurements 3/8″ (F) and 1/4″ (M) are those required and that the connection direction is consistent with the system.

• Compatibility check: check the type and size of the threads of the components to be connected.
• Sealing: use a sealing system suitable for threaded connections and the operating conditions of the system (according to sector procedures and practices).
• Assembly: screw carefully to avoid damage to the threads; tighten appropriately according to good installation practices.
• Maintenance: in case of frequent disassembly, periodically inspect threads and mating surfaces.

If you are rebuilding a line or replacing a component in the nautical field, it may be useful to note the code 0246C*B and configuration F-M 3/8″ x 1/4″ to speed up future maintenance or procurement activities.

FAQ – Frequently Asked Questions

What does reduced F-M sleeve mean?

Indicates a threaded fitting with one female (F) side and one male (M) side, designed to connect two components with different thread sizes.

What are the dimensions of this Maestrini reduced sleeve?

This model has a 3/8″ female thread and a 1/4″ male thread.

What material is the fitting made of?

It is made of brass (indicated as yellow brass in the product description).

What is the product code for reordering?

The Maestrini supplier product code is 0246C*B.

In which contexts is a reduced sleeve like this typically used?

It is used in hydraulic systems and technical applications to adapt different threads, for example in maintenance, replacements, and onboard system installations when it is necessary to go from 3/8″ to 1/4″.