Reduced double screw M-M 3/8"x1/4" – code: 0245C*B – Maestrini

Reduced double male screw Maestrini 3/8″ x 1/4″ (code 0245C*B)

The reduced double screw M-M Maestrini is a male-male coupling designed to directly connect two components with female thread of different sizes, creating a reduction 3/8″ x 1/4″ in a simple and orderly way. It is a practical solution when, in an existing system, it is necessary to adapt a connection without resorting to chains of adapters or combinations of fittings that increase bulk and complexity.

Identified by code 0245C*B and produced by Maestrini, this reduced double screw is part of the technical hardware for hydraulics and fittings and is suitable for maintenance, retrofit, and line adaptation interventions, even in typical onboard plant engineering contexts. As with any threaded component, it is essential to check the measurements and type of threading of the components to be coupled before installation.

Features and construction details

Type: reduced male-male fitting

The component is a double screw with two male ends, designed to screw into two female seats. The peculiarity is the reduction between the two sizes, useful when the connections to be joined are not homogeneous.

• Configuration: M-M (male-male)
• Reduction: 3/8″ x 1/4″
• Product code: 0245C*B

Material

The reduced double screw is indicated as made of yellow brass. This material is commonly used in fittings for hydraulic and technical hardware applications, thanks to its workability and widespread use in many plant configurations.

Identification and traceability

For orderly spare parts management and to avoid misunderstandings during procurement, the main reference is the Maestrini code 0245C*B. In maintenance contexts (onboard warehouse, workshop, construction site), having a unique code helps to quickly replicate an already installed configuration.

Typical applications

This reduced double screw is designed for all situations where it is necessary to connect two female elements with different sizes, maintaining a linear and clean connection. It is particularly useful when working on existing plants, where component sizes may vary due to previous replacements or different design choices.

Hydraulic systems and fittings

• Adaptation between components with female threads of different sizes.
• Ordinary and extraordinary maintenance interventions on existing lines.
• Restoration of connections when a replaced component has a different fitting.

Technical hardware and onboard plant engineering

In the nautical field and onboard plant engineering, the need to adapt connections is frequent during retrofit and upgrades. The reduced double screw allows managing the transition between different sizes compactly, reducing the need for “cascade” solutions with multiple fittings.

• Retrofit and plant modifications where existing connections need to be standardized.
• Quick interventions in technical spaces where fitting bulk is an important factor.
• Alignment of female connections without introducing unnecessary additional elements.

Usage and installation notes

For correct assembly, it is advisable to proceed with a preliminary check and careful installation, as with any threaded fitting. Below are some general guidelines useful during selection and installation.

Thread verification

• Check the measurements: make sure that the components to be connected actually have female seats , in the and 1/4″.
• Check the type of threading: before installation, verify that the threading standard of the two elements is compatible with the intended fitting.
• Evaluate the dimensions: in tight technical spaces, plan access for screwing and possible future removal.

Installation in maintenance and retrofit

In retrofit or line adaptation interventions, it is good practice to check the condition of the female seats (cleanliness, thread integrity) and ensure that the coupling occurs without forcing. If the system is already in operation, plan the intervention safely according to the procedures provided by the application context.

Choosing the correct component

If you are replacing an existing fitting, always compare:

• measurements of both sides (in this case , in the and 1/4″);
• configuration (here M-M);
• article reference (0245C*B).

In case of doubts about compatibility with already installed components, it is preferable to directly check the threads and measurements before ordering, to avoid returns and system downtime.

FAQ – Frequently Asked Questions

What is a reduced double-ended M-M screw for?

It is used to connect two components with female threads of different sizes, creating a reduction between the two sides with a single male-male coupling.

What are the dimensions of this Maestrini reduced double screw?

This version achieves a reduction from 3/8″ to 1/4″.

What is the Maestrini product code for this item?

The indicated product code is 0245C*B.

What material is it made of?

It is indicated as made of yellow brass.

Is it suitable for maintenance and retrofit of systems?

Yes, it is a useful component in maintenance and line adaptations when it is necessary to standardize existing connections between different sizes. Before installation, it is recommended to verify the sizes and thread types of the components to be coupled.